Malicious PDF — malware analysis report

Static analysis result for SHA-256 6108343acc094acf…

MALICIOUS

PDF

37.3 KB Created: 2020-10-26 22:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 08efb3e81827fca2eb9bedf8c889d463 SHA-1: 3a12b27d048d346fd8ecab2c5e7c306952a89a6b SHA-256: 6108343acc094acfaf9e42cc6ac5a361834d73e23ba4f0c67b6eb73950aa57e0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a large number of embedded links, many of which point to a redirector URL. The document body text, though heavily obfuscated, contains the redirector URL and other benign-looking PDF filenames, suggesting a link farm or SEO poisoning tactic. The primary malicious URL identified is https://gettraff.ru/strik?keyword=lg+x+power+3+manual, which is likely used to redirect users to a phishing or malware distribution site.

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://gettraff.ru/strik?keyword=lg+x+power+3+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5f8c80062082e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f873608058ac.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/8920202.pdfIn PDF document text
    • https://koxarakofawel.weebly.com/uploads/1/3/4/3/134310925/9919114.pdfIn PDF document text
    • https://fapifejoj.weebly.com/uploads/1/3/4/2/134265577/jixomovedadipanetar.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/zoragowesiw.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/1/0488/4080/2469/files/gunship_battle_mod_apk_download_latest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/carbon_cycle_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/82602990897.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/mebef.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/75154434904.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/alternative_fuels_research_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/aufgaben_englisch_klasse_5.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/43349821888.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/capoeira_roots_of_the_dance-_fight-_game.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/ikea_qatar_catalogue_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/bilingual_education_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/mazelupomev.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/bejaxuxusirobetebol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5129/2584/files/rodopax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9150/0449/files/happy_birthday_in_arabic_egypt.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_off00005352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5352 5224 bytes
SHA-256: 09ef05cd00cb4e950b8515fdc1bc2caf2ea7996ffb8525e0659ab0c6764c6a33
font_01_sfnt_off00006522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6522 10284 bytes
SHA-256: 85de4900148b3221b33fbb62b88dc27c69963d071394d8a0942e0c6bab7a9fce