Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de3b225e2f34453…

MALICIOUS

PDF

43.1 KB Created: 2020-08-17 17:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d0ab0a6d569f59268012323c1fcf1ac0 SHA-1: 99b9a9944e5426cc05cb863808bd13ca0a40d4e0 SHA-256: 5de3b225e2f3445356160ff898bee5a45f07e639e5ba9f77787df2909c6fe45c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a link farm and a known malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious. The presence of a link to 'https://ttraff.ru/pify?keyword=thailand+tip+guide' suggests a phishing or scam attempt, likely to trick users into downloading further malicious content or revealing sensitive information. No scripts were extracted, but the PDF structure itself facilitates the attack.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=thailand+tip+guide In PDF document text
    • http://files.lucindaroweart.com/uploads/1/3/1/3/131380000/4228b0f.pdfIn PDF document text
    • http://puralid.fullcirclelivingdyingcollective.com/uploads/1/3/1/6/131606968/4dc61dcc7602.pdfIn PDF document text
    • http://files.drajaiseth.com/uploads/1/3/2/7/132740637/7519abd898c2b6.pdfIn PDF document text
    • http://jozus.jilledelsteinlcsw.com/uploads/1/3/1/4/131406947/0c598b3bb.pdfIn PDF document text
    • http://files.foosie.store/uploads/1/3/1/8/131871614/053f95e.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/1/0432/2073/0020/files/33137314205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/29390593386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5663/4785/files/pufinab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/channel_2_atlanta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/fegefakejapir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/62754443942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/xepafepeganowugijatabaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9178/6918/files/26297135427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/vapig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/comment_fusionner_des_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/56964683807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/mimoviwefotibedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/99539768160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3567/0166/files/school_cafeteria_menu_template_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5F 4896 bytes
SHA-256: 54158361fe6b802572a517979ec48fa86a19fcec408c2f9e964cedb3d1631183
font_01_sfnt_off00007afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFD 10832 bytes
SHA-256: b560ad3ae288e75970b65a39954ae46f4248d4d07ca1290f0c808679a5c97442

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