Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d62168e1097103c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 08:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a60dcef324e7c556bd12222fb4b85b0a SHA-1: 5c41b2434e3f2b84af9e147c17e6665296cc792f SHA-256: 0d62168e1097103c0fdb4786d20aa46e4935b4da52d03ab2fcc87101ae13991d
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Android version distribution 2019' and a URL that likely leads to a malicious payload. The presence of numerous Shopify links suggests an attempt to blend in with benign content while directing users 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=android+version+distribution+2019
    • http://xokejabed.cherrybooks.co.uk/uploads/1/3/1/0/131070313/fetogeve_nofodip_dodesikaxazog_bejiximogefuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8644/6746/files/dexovarolepibavitowoweg.pdf
    • https://cdn.shopify.com/s/files/1/0435/2802/8312/files/2772939531.pdf
    • https://cdn.shopify.com/s/files/1/0437/6903/6962/files/julupewolifepokokekakov.pdf
    • https://cdn.shopify.com/s/files/1/0434/3198/5309/files/operating_cash_flow_ratio.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9288/files/tejapizutakuziw.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2287/files/14993794734.pdf
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/renascimento_carolngio.pdf
    • https://cdn.shopify.com/s/files/1/0432/0450/9853/files/roxijus.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_off0000654f.bin
3182fac4035c460aac880d7aad034a4c619632bbe3b5536ad32370d358db5f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654F 5248 bytes
font_01_sfnt_off0000773d.bin
243c72341faf6a611b0765430b077e8f8afd52c91479fe6c777bdac422541e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773D 10288 bytes

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