Malicious PDF — malware analysis report

Static analysis result for SHA-256 8270ce18f2d7c895…

MALICIOUS

PDF

38.0 KB Created: 2020-08-21 14:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c344efd12d9a8cf4cea81d962f846aa SHA-1: fd8d8122de870d2762e0857978a5b40dc8f5e050 SHA-256: 8270ce18f2d7c89554742a05ad494e584bb90063673ba62f2414e05e853c3b28
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically identified by the 'ttraff.cc' domain, which is flagged as a malicious redirector. The document body, though obfuscated, contains the URL "https://ttraff.cc/pify?keyword=logarithm+rule+worksheet", suggesting a lure to a malicious site disguised as educational content. The presence of numerous other PDF links further indicates a link farm or redirection scheme.

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=logarithm+rule+worksheet
    • http://files.litvaklab.org/uploads/1/3/1/3/131380288/rukonu-rozida-vivijuma-sasuwiwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/6408457534.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/18873878980.pdf
    • https://cdn.shopify.com/s/files/1/0430/5407/1957/files/54465566586.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/audi_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/ruxejadezakupifetesorajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/causative_exercises_4_eso.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/wanting_memories_satb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/advanced_life_support_manual_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/putekanatikotuva.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/aadhar_card.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/7356644851.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/27657067032.pdf
    • https://cdn.shopify.com/s/files/1/0433/3135/4774/files/78919393892.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_off000056c1.bin
5628a4f3772859dcc9515048e6b69ba771d5a76674839a11dcc51dda22bd5a47
pdf-font-stream PDF embedded font (sfnt) at offset 0x56C1 5196 bytes
font_01_sfnt_off00006861.bin
0b25837c696d576df4ec7376ea81600d8523d1991f18b161130bcde3529437aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6861 10192 bytes