Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8486a5863394c7…

MALICIOUS

PDF

50.6 KB Created: 2020-08-05 09:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0a61aa5d72f8e2cfee0a95167735a2c SHA-1: baec00975e9220b200859cd8dd8bb154d259abf6 SHA-256: 2f8486a5863394c7e400c538f5d54cd95b8a24c66459c5ac868dda0acd4c4ddf
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.com', suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains the same redirector URL and references a 'roald dahl pdf', likely a lure. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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=galloping+foxley+roald+dahl+pdf
    • http://files.mhdany.com/uploads/1/3/0/9/130969986/7105548.pdf
    • http://files.bakingwithella.com/uploads/1/3/1/8/131871852/temudutedegalivejoza.pdf
    • http://xorirarig.sophiasoasisforequines.org/uploads/1/3/0/8/130874085/4573007.pdf
    • https://cdn.shopify.com/s/files/1/0430/5462/9015/files/81472524635.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/pimujewaxinugusebu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6296/5912/files/49673604138.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/pidifemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7746/7288/files/ace_academy_notes_for_ece_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/sokurezixesedavatefina.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/wujotizetugab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/tosomazip.pdf
    • https://cdn.shopify.com/s/files/1/0431/9055/0679/files/litterature_negritude.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/38790634153.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8790/files/add_png_image_to_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/dum_dum_girls_coming_down.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/73219493256.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000096dd.bin
ac3c8ba20a8741aa82462742c74416c3313074d2981c43e5d9f844b6d4bc7aec		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x96DD 22448 bytes
font_00_sfnt_off00006296.bin
a6b4f3d454cb370f4295e09922ecf21d6f88d82edf8b2d287f253b6839ba9edf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 5328 bytes
font_01_sfnt_off000074be.bin
db0d8d7f4fa1a6f0e80af6aca5f60af4b9d4af3e01e76c881126bf520366926e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BE 9920 bytes

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