Malicious PDF — malware analysis report

Static analysis result for SHA-256 741f36de1212833e…

MALICIOUS

PDF

49.1 KB Created: 2020-07-31 22:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52d063078a61b157b4cb4cf6e34eeb86 SHA-1: d0026b14656a4134bd2a689f84ec77b28da833e3 SHA-256: 741f36de1212833eee837f976781d5c36ab06c6c295c3bd210271e2ab7eb8db6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The ML classifier also strongly flagged this PDF as malicious. The presence of a malicious redirector URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=find+the+vertex+calculator
    • http://files.knottooshabbyeventplanning.com/uploads/1/3/1/6/131606353/pamarunorifapo_pifimepaxa.pdf
    • http://files.doseofuwo.com/uploads/1/3/0/7/130740522/76da185874c2.pdf
    • http://files.shorewoodmovingforward.com/uploads/1/3/1/4/131407709/satax.pdf
    • http://files.paintnwithfriends.com/uploads/1/3/1/8/131857983/7921390.pdf
    • http://files.asikeyipark.ca/uploads/1/3/0/9/130969751/aa61ed562e11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/battlefield_4_player_count.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/76054850202.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/8114035754.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/dukadulodusutedasegururo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/78753134693.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1152/files/zibumegadujuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/9850/4354/files/1996_subaru_legacy_outback.pdf
    • https://cdn.shopify.com/s/files/1/0431/6492/6111/files/setagaxefe.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/nufekoxiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/97295907281.pdf
    • https://cdn.shopify.com/s/files/1/0437/6333/5319/files/fodajokukivisajuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/xoxudez.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/8602926679.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f31.bin
1a81ca16d3564ea71ee8930437c4fa428881cbf78688c046712efbb688b0b962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F31 4932 bytes
font_01_sfnt_off00006ffa.bin
af354d82ec72c102054ed6e8ca87cbc3ce2f2ce310c945eac6b55243190fa970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFA 15608 bytes
font_02_sfnt_off0000a0f7.bin
a534b91c4ec3d8756e3a834051570443c69e75f38d6508a28567570861ffac3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F7 16080 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.