Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbdac5039d8a8be…

MALICIOUS

PDF

35.9 KB Created: 2020-08-25 11:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b67aed0bce0ef1d2d595557765124fa4 SHA-1: 2a8736e9137edd7106927c3ad1ed8d5b3b9a1448 SHA-256: fdbdac5039d8a8be14fe0f5f00bfb4b1a7407076e38b85a437e092f2c1165aaa
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as search results for educational materials, with the primary link directing to a known malicious redirector. The document body, though heavily corrupted, contains fragments that suggest a lure related to 'glencoe mcgraw hill math course 3 answers'. The PDF structure and embedded links indicate a phishing or redirection attempt to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=glencoe+mcgraw+hill+math+course+3+answers
    • http://files.cbible.org/uploads/1/3/1/3/131383942/mufozevojokem_sitilanako_fekawiz_burepa.pdf
    • http://files.crossfirerec.com/uploads/1/3/1/8/131871871/xogakevo-juvurevokunire.pdf
    • http://kuxiro.miweddingpainter.com/uploads/1/3/2/8/132815806/7847985.pdf
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/jafovurisowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/67163406229.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/nuwave_oven_recipe_book.pdf
    • https://cdn.shopify.com/s/files/1/0443/6996/9308/files/tiregukigojuvepafa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/muvusi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/kupofinipul.pdf
    • https://cdn.shopify.com/s/files/1/0454/3024/3484/files/92932707237.pdf
    • https://cdn.shopify.com/s/files/1/0441/2728/9496/files/gutakorevopan.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/pumubisalupawilaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/practical_music_theory.pdf
    • https://cdn.shopify.com/s/files/1/0428/2033/7831/files/reasoning_ability_tips_and_tricks.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_off00004ed7.bin
60501ed3e5c2da49c5b34d99c1b739d076da66d29d676354405ff8b7e94bbd21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED7 5500 bytes
font_01_sfnt_off00006175.bin
718fc454b5ceaaecb693db0afe5f4241ba8a49c783df65d910919df64fe9dc15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6175 9704 bytes

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