Malicious PDF — malware analysis report

Static analysis result for SHA-256 64aea15bb50e4b1e…

MALICIOUS

PDF

40.8 KB Created: 2020-08-22 14:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f3aec65a88b5fea24cadc82313e5b65 SHA-1: 98cf8d50ef445929104de94a333519ba4fd1972f SHA-256: 64aea15bb50e4b1e7c71309e1dacd08fe64487b259b2e34623262cd5777c37bc
154 Risk Score

Malware Insights

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

The PDF contains a large number of links to external PDF files, many of which are hosted on Shopify. One of the embedded URLs, https://ttraff.cc/pify?keyword=free+residential+lease+agreement+template+word, is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites.

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=free+residential+lease+agreement+template+word
    • http://mikiw.dreamsupercars.net/uploads/1/3/0/7/130739811/8693856.pdf
    • http://pejefa.achievewe.org/uploads/1/3/2/7/132740930/rogebapinatibo_bodebumirodi.pdf
    • http://files.freedformats.com/uploads/1/3/2/7/132712661/fumoviv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/jogumilagotamotilutilure.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/4979649388.pdf
    • https://cdn.shopify.com/s/files/1/0430/7137/3466/files/3d_printer_applications.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/niwewajekuxalebexizaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/mutugitidesazuwifuma.pdf
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/pisoladelatodo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/83058255540.pdf
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/another_oh_hae_young_ost.pdf
    • https://cdn.shopify.com/s/files/1/0433/7673/8462/files/37300073659.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/tinkers_construct_sword_modifiers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6654/6583/files/susadiva.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/rupaul_s_drag_race_season_6_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/vajigexaxudabap.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_off0000629f.bin
0a6ad523e4fff429e4500650dc1c96f91faa45c83858d3c403511bfc5eba3077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629F 5324 bytes
font_01_sfnt_off000074b4.bin
c5886a60dbed4ca8086608e95992cb4f739c94095c6e6c2d7ab2237e04da42b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 9832 bytes

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