Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a1dd136591e731…

MALICIOUS

PDF

48.9 KB Created: 2020-07-24 11:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 9fa7b1017490d4acd09dd52b2ba3ac31 SHA-1: 95af444081e6a0c93ca9db2fb6e3243ebc81c1c7 SHA-256: 65a1dd136591e731d80654ec3c18e0e511d6e66e70ca5f7bee4ec2a06c22d706
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a link farm hosted on ttraff.com, which is flagged as malicious. The document's content, though heavily obfuscated, appears to be a lure related to 'Cie 10 enfermedades mentales pdf'. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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/wb?keyword=cie%2010%20enfermedades%20mentales%20pdf In PDF document text
    • http://files.ildiamon.com/uploads/1/3/0/9/130969705/rozozitode.pdfIn PDF document text
    • http://files.nickseifert.com/uploads/1/3/1/6/131606222/2221880.pdfIn PDF document text
    • http://files.txtorches.com/uploads/1/3/0/7/130775776/376dea.pdfIn PDF document text
    • http://files.robbielee-illustrator.com/uploads/1/3/1/1/131164252/9877543.pdfIn PDF document text
    • http://files.thedragonshoard.net/uploads/1/3/1/1/131164275/midabopakev.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/1/0432/5074/5512/files/83205912761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/rebekuxusob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/96391719920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/takijenewarerozipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/61303888641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/nepotobemejanegepunoduv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5380/0859/files/83651687101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8304/6813/files/letupimibezikuvoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0510/8636/files/lijupumufugedalisujorafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/vubaforavidoxunomavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9706/2564/files/90054787945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/buwikinowitizojoginoxevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/suvogudigagaberidada.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_off00008166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8166 5080 bytes
SHA-256: dcbe29b2e5fd675673e1f93aa8666a6aa26ed855dbe105bd8275f51c8d1a5b49
font_01_sfnt_off0000928e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928E 10436 bytes
SHA-256: 281687127471bff309ea26a74e17a24dcd75fc5993d25600f4c37b5936135600

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