Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79acff597179f05…

MALICIOUS

PDF

46.4 KB Created: 2020-08-10 19:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 308107638b38588800d7d61d4fd50e28 SHA-1: 1deb8b59498dfecb838994823e136b085c89ae5f SHA-256: e79acff597179f057519eb2f00731b57f5c3edadde768918d624243dd2610d40
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are part of a link farm designed to manipulate search engine results. This suggests the primary purpose is to lure users to malicious sites.

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.ru/pify?keyword=architectural+thesis+book+pdf In PDF document text
    • http://dibat.thelostblonde.com/uploads/1/3/1/3/131383648/128ad63a4de4e04.pdfIn PDF document text
    • http://files.marlboroughcoop.org/uploads/1/3/2/3/132303310/8011606.pdfIn PDF document text
    • http://gosumelub.cardenarborview.org/uploads/1/3/2/8/132814930/subapukivona-gabarunuzekigu-jelatikazipulu.pdfIn PDF document text
    • http://files.detailsstrategicadvisors.com/uploads/1/3/0/7/130776682/gawunexix.pdfIn PDF document text
    • http://files.bargeshareforsale.com/uploads/1/3/1/6/131607027/juzivas.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/1/0431/5663/5816/files/64991880084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4111/9653/files/filevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0780/2531/files/8035324002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/votekibetajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/31550737770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/84700401698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/31397987440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9238/1589/files/82629161783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/caccia_al_tesoro_indovinelli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/44626595282.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 4

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_off000069c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C6 5212 bytes
SHA-256: bbbedda614337907c131d7a0cb6f3ea09031917296165bd8357b6ccee4e6a5e1
font_01_sfnt_off00007b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B83 10368 bytes
SHA-256: 8ea60f41632e99cde29bcdcb29e63a6e422fc5e1e260093ecd9ec48e0da48961
font_02_sfnt_off00009eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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