Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e59a1d40be74177…

MALICIOUS

PDF

46.8 KB Created: 2020-08-08 03:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 175189939b62c756497a89a4ffcc3853 SHA-1: 9bcdb6927c60d13819e568a85d6794097b0163bd SHA-256: 1e59a1d40be74177cdeee70654d06c246f614de3b4ef12a1deaa31a837535dd8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, also contains the same malicious URL. This suggests the primary intent is to redirect the user to malicious content, likely for further exploitation or malware delivery.

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=chinua+achebe+short+stories+pdf
    • http://rofulewuk.appletreeforgewv.com/uploads/1/3/2/3/132302780/bd9fb05b0.pdf
    • http://files.hindidox.com/uploads/1/3/1/3/131398059/jilotilikobuzobezuk.pdf
    • http://files.kandopuppies.com/uploads/1/3/1/3/131398125/mexeno.pdf
    • http://files.hopefororphans-congo.com/uploads/1/3/1/0/131070051/9619761.pdf
    • http://files.fleenorfamilyadventure.com/uploads/1/3/0/7/130775134/voxijezo_bifirogoka_fixipaseket_bafowexinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40545468116.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0439/6810/2558/files/25367341567.pdf
    • https://cdn.shopify.com/s/files/1/0433/3076/4955/files/93654895006.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/8924265107.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/ketogenic_diet_for_beginners_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/36697129711.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peposorutap.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6935/files/77769477150.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7427/files/zumozal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9204741539.pdf
    • https://cdn.shopify.com/s/files/1/0439/3032/1051/files/spelling_bee_word_list_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/9649/7573/files/stereochemistry_of_allenes_spiranes_and_biphenyls.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/28259453267.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_off000073f1.bin
912f5df6c2ecfa12a8bd5651f4e9ca92f5f9328245c217c8866320662f30b744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F1 5256 bytes
font_01_sfnt_off000085bd.bin
7767cb5a79abdf112e2c12bb9d0ee64fb63d22fe3a5444c202ae4e6f7a42c4cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85BD 14196 bytes

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