Malicious PDF — malware analysis report

Static analysis result for SHA-256 757c13801f16359b…

MALICIOUS

PDF

45.0 KB Created: 2020-08-15 23:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 35fc6d8765c893056d359bddd4d03d95 SHA-1: 67b7804f2317c97f7a38f2a393df17168d999a66 SHA-256: 757c13801f16359bef39996ed069ffd1139ccb2c1e4963ebfd053a697a59db29
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a primary URL pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to viewing electronic invoices. The presence of numerous external PDF links and a redirector link indicates an attempt to drive traffic to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and link farm heuristics suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wb?keyword=como%20visualizar%20nota%20fiscal%20eletronica%20em%20pdf In PDF document text
    • http://xiwiwure.middletonreview.com/uploads/1/3/0/7/130739615/3746121.pdfIn PDF document text
    • http://files.oraclefitness.com/uploads/1/3/0/7/130739826/887303.pdfIn PDF document text
    • http://files.teamsterslocal896.org/uploads/1/3/0/7/130738805/b942055f543e.pdfIn PDF document text
    • http://files.msubpnp.com/uploads/1/3/0/8/130813796/9285059.pdfIn PDF document text
    • http://zepar.richmondhillnaturopath.com/uploads/1/3/1/3/131383483/gajowikope-ganuzi-vibeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4503/4911/files/nakshatra_astrology_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/lesofewimamejozux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78992801071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/47020766674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/bel_canto_technique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/probability_and_statistics_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/27672097120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2335/1458/files/90622902040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/red_chinchompa_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/adobe_reader_ubuntu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0426/3580/files/32325453994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2949/4940/files/ripuburokok.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFA 5316 bytes
SHA-256: e867acb4579ca7dff18e55dc2f75ca99562d74f042618f354c5d7dbe83aff15c
font_01_sfnt_off00007206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7206 11356 bytes
SHA-256: 1b211027a24287a6ae1bb1492d987f6c783847feedddec1c0c0538260fc6a9cb
font_02_sfnt_off00009702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9702 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361