Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5fe4f79eae8f7f…

MALICIOUS

PDF

61.0 KB Created: 2020-08-07 15:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0d0b4f38aa464d366891b5698bfe811 SHA-1: aa72fa9fe11d7268ce4031d823b5118ed7d80d78 SHA-256: be5fe4f79eae8f7f79d7026ebe4bb06cd328ea099ed867fd674298009989a757
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to `https://ttraff.cc/pify?keyword=libro+quien+es+san+miguel+arcangel+pdf`. This indicates the document's primary purpose is to lure users to a malicious site. The presence of a large number of external PDF links further supports a link farm or redirection strategy. No scripts were extracted, and the document body is heavily obfuscated, but the malicious URL is clear.

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=libro+quien+es+san+miguel+arcangel+pdf
    • http://files.alphanustate.org/uploads/1/3/1/3/131383581/wezopuzake.pdf
    • http://files.filigreetheatre.com/uploads/1/3/0/7/130776407/lugupidovime_jitawom.pdf
    • http://files.oibaws.org/uploads/1/3/0/9/130969446/gufiluje.pdf
    • http://zojokiz.knutsonconsulting.com/uploads/1/3/1/4/131406717/4e75ee8a274f01.pdf
    • http://files.spiritofthefiddle.ca/uploads/1/3/1/4/131438113/b0dc5f72408bc2.pdf
    • https://cdn.shopify.com/s/files/1/0434/8480/7334/files/75106670097.pdf
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/bissell_little_green_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/zekag.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8582/files/bidafogez.pdf
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/7387653199.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevuwuvufotolotatagonisex.pdf
    • https://cdn.shopify.com/s/files/1/0434/4804/1637/files/bevasojinolun.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/82808049389.pdf
    • https://cdn.shopify.com/s/files/1/0436/2688/9374/files/ledukepek.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/96528440389.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2426/files/ximeloletosaxobafolu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/81792015347.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/xusetuna.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8969/files/lalapamavazipizipo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/assessment_for_learning_textbook.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a867.bin
79c820f1f01f4e7e04aef9c996d8e945efc0db089f306465842f12021fa7c5f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA867 5684 bytes
font_01_sfnt_off0000bb9a.bin
14002ee230417a10751041f369d0973ac957c88365af999fbaf03eee42ef396c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB9A 12780 bytes

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