Malicious PDF — malware analysis report

Static analysis result for SHA-256 68280b1990bb6aa8…

MALICIOUS

PDF

47.8 KB Created: 2020-08-14 04:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1030e9b96d28d48a604cb14b88497b2 SHA-1: e73bcb92c682c573ad829fb30b9dbdf254314f23 SHA-256: 68280b1990bb6aa8e8ac1a6d2dae964c197638d60616ea86d31e70225e4cf5e5
154 Risk Score

Malware Insights

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

The PDF contains a deceptive title and numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting an attempt to drive traffic to malicious infrastructure.

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=ads+keep+appearing+on+my+android+phone
    • http://files.woman-empower-yourself.com/uploads/1/3/1/4/131409200/waxewagu.pdf
    • http://files.riversidetreeserviceco.com/uploads/1/3/1/8/131872015/vadigonipivuxubako.pdf
    • http://gefagone.kimonosk.com/uploads/1/3/1/6/131637136/zuruwejovarim.pdf
    • http://beluwet.laurakhuber.com/uploads/1/3/1/0/131070792/noxesed_filamukixular_torize.pdf
    • http://files.dubiousalliance.com/uploads/1/3/0/7/130775242/faxesipisuko_furefos_fujizosasusako.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/46867367218.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/zijedez.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/17581155156.pdf
    • https://cdn.shopify.com/s/files/1/0432/9291/7924/files/3444570151.pdf
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/kesegeguwomenemojerotuzol.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5965/files/76366673857.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/bosifipiremuge.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/69331040603.pdf
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/losonutebamenaxinebu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2452/2143/files/25878339151.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/datufezon.pdf
    • https://cdn.shopify.com/s/files/1/0432/1037/5325/files/88560418829.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/gesuni.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cca.bin
0087198a861eeb20445b814430c15a35a1f8b2d455a2ed76314147f73be7b9c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCA 5204 bytes
font_01_sfnt_off00007e4e.bin
4375a4138ab9a07ecc3dca5f8b604d24a7084af71741351aebac9be942510a00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4E 11080 bytes
font_02_sfnt_off0000a3e3.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E3 4324 bytes

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