Malicious PDF — malware analysis report

Static analysis result for SHA-256 1037c81dd4e22471…

MALICIOUS

PDF

45.7 KB Created: 2020-08-20 04:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 406cab98fc70871bf30e08513525658e SHA-1: ab6ac1592d9fb5c98b1e95243b77342b0fd298be SHA-256: 1037c81dd4e2247159d88c52a2fae538dfc101d39d8fe5515864e75a52595d55
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially obfuscated, contains the same lure text and URLs found in the heuristics, suggesting an attempt to trick users into clicking the malicious link. The presence of numerous external PDF links also points to a link farm strategy, likely for SEO manipulation or to host further malicious content.

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.cc/pify?keyword=official+vatican+museum+guided+tour
    • http://files.armwrestlingarchives.com/uploads/1/3/1/3/131380934/5d6331b1284650.pdf
    • http://buraru.pickledpretty.com/uploads/1/3/1/4/131453870/8096420.pdf
    • http://files.veterinariagiada.com/uploads/1/3/0/9/130969306/6147838.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/87788459225.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/72626948850.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/6005/files/65378066888.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/garowawosowirobimimu.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/most_fun_zodiac_sign_yahoo_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/pojozimeserum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/adestramento_inteligente_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/5261119742.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/liwofunarunaligi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/14223557570.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/form_hw_4.pdf
    • https://cdn.shopify.com/s/files/1/0436/4448/5790/files/55225133499.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/adobe_photoshop_cs2_shortcut_keys_free_download.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007415.bin
cda0888da92da15913a0dd672ccf0a222ee8723998128f1fdb7abbe2c71c45d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7415 5428 bytes
font_01_sfnt_off0000867c.bin
bb03f5dd58e80749fc987c618190df3b4de85cf722735f24084d908887de1802		 pdf-font-stream PDF embedded font (sfnt) at offset 0x867C 10228 bytes

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