Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b044fb7cb0d3d44…

MALICIOUS

PDF

77.4 KB Created: 2020-08-05 18:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe44552d8fd9808550c574f28615a091 SHA-1: 792ef82ee217727fcc4e95fc11008c73a04aceb5 SHA-256: 6b044fb7cb0d3d441353cc029b9a4f51614c213fdb8c377096fcecd477cf617c
214 Risk Score

Malware Insights

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

The PDF contains multiple links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=acca+f6+finance+act+2020+pdf'. The document body also contains text related to financial acts, suggesting a lure for phishing or scamming. The presence of numerous external PDF links indicates a link farm, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=acca+f6+finance+act+2020+pdf
    • http://files.eytspartans.org/uploads/1/3/2/8/132814996/fusakupafogureb_rosama_somufivijaso.pdf
    • http://gupeweto.coachhouseaccommodationledbury.com/uploads/1/3/1/0/131071243/levojurogidozifavo.pdf
    • http://files.electrolysisandco.com/uploads/1/3/1/8/131857631/jarobemanilizedos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9722/files/kidijigipudotepazofale.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/54201729955.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/13073748687.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7182/files/35820184117.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9558/files/88486348689.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/zitadopudeji.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/44364898111.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0435/2956/8408/files/tunuvorevepanigixasizade.pdf
    • https://cdn.shopify.com/s/files/1/0429/8647/1587/files/3rd_grade_vocabulary_activities.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/98819259616.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_off0000f327.bin
beb3e6e9cdc9c5e629b6f64fa914deca421a6b966a50a00f4a2dbdbe095801cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF327 5260 bytes
font_01_sfnt_off00010528.bin
3d7d036e8b7a34fcd32ef614754392eb12ec1af06aae65d6b92e3b78cf63a1a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10528 10180 bytes

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