Malicious PDF — malware analysis report

Static analysis result for SHA-256 71806aaf46dd62f3…

MALICIOUS

PDF

46.1 KB Created: 2020-08-14 10:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac0a62f420a88622874be65bf34ca7ce SHA-1: 2b343d9c7bc6c5bccaa36773382cba6fa1e9452c SHA-256: 71806aaf46dd62f31663e2f7fa4536c6fcb8384be522c69684a22f916417dcd9
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'basic physics mcqs with answers' and a URL that appears to be an SEO lure. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/pify?keyword=basic+physics+mcqs+with+answers In PDF document text
    • http://rizuru.pestcontrolsolutionsla.com/uploads/1/3/1/4/131412181/febumebamisirazoparo.pdfIn PDF document text
    • http://tojaxil.cuttingedgedm.com/uploads/1/3/2/8/132814928/timivajomer-kokipibiso.pdfIn PDF document text
    • http://fesegamok.rowdygainesmastersclassic.com/uploads/1/3/1/3/131383790/8888838.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/1/0445/1749/0847/files/wikatoravepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/8152297183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/73804272715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/salufisiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9713/6030/files/takekogakaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/stripe_test_credit_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7699/3695/files/legidaweliv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/lakogeragisivufegapug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1184/5793/files/21607054706.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6877 5188 bytes
SHA-256: 1c03e997d028dca20c558676e73b7c277cc2f0630330dfab93bb89a141f09bd2
font_01_sfnt_off00007a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A00 10528 bytes
SHA-256: 9705d5e6536d5ac9be5682fba0f1cba91f9a6729e873f1c296e98f521849abc0
font_02_sfnt_off00009dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.