Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c2b115296eac57…

MALICIOUS

PDF

44.6 KB Created: 2020-08-03 12:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fda43dd9229aae0172e85687d021c449 SHA-1: c384e423a393cc115aefc0775ca7711bdfcddbe2 SHA-256: 16c2b115296eac57646259dd389b74d00556502cd63e42011b55da0d7a31db04
194 Risk Score

Malware Insights

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

The PDF contains numerous links to an SEO redirector, which is a common tactic for phishing and malware distribution. The primary redirector URL is https://ttraff.ru/wb?keyword=conflict%20mediation%20process%20pdf, which likely leads to a malicious payload or phishing page. The ML classifier strongly indicated maliciousness, and the presence of a link farm reinforces the malicious intent.

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/wb?keyword=conflict%20mediation%20process%20pdf In PDF document text
    • http://files.ameliahamiltonfit.com/uploads/1/3/0/7/130740429/7987861.pdfIn PDF document text
    • http://files.girlwiththeflowertattoo.com/uploads/1/3/1/4/131438008/9b0b972a.pdfIn PDF document text
    • http://files.radicallyawakenedmasters.com/uploads/1/3/1/6/131636914/rixitazemosiko_xesoxatol_rofebepotuluze_jikukolufog.pdfIn PDF document text
    • http://files.honey-land.eu/uploads/1/3/2/7/132740445/pozikesumajitu-xiluno.pdfIn PDF document text
    • http://kilexej.way2heal.com/uploads/1/3/1/3/131380126/2582977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/85601875626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/61163854122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/sodiwakiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2814/2501/files/82588368758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/94187330298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/95883719931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2528/5798/files/98273938077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3019/7925/files/nsfw_subreddit_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8577/files/pafevofezofi.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7149 5208 bytes
SHA-256: 6b3f876b26743f9726704b94ad531a801c718a8198eb65acadd0638f892b929f
font_01_sfnt_off000082e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E3 10232 bytes
SHA-256: f061b40f4a75617da42097e983e9b47163d5b0e87e3e09a78bc7cd5b5dc58a6a

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