Malicious PDF — malware analysis report

Static analysis result for SHA-256 777c69669b2a9185…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 15:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 628d9f5580a91328baef4d784ed27607 SHA-1: bbb70a2aeaa2e738e7871de38428379c047a4621 SHA-256: 777c69669b2a9185057e60c66083ddc5ed7aebf7cc87ebaff32d393a12d661b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious domain (ttraff.com). This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/wix?keyword=dolphin+rumble+xbox+360
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8497/1173/files/tevupekelekapakun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zozaweguxilamefawe.pdf
    • https://cdn.shopify.com/s/files/1/0462/7093/9285/files/hodder_cambridge_primary_english_stage_4.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/definicion_de_plaquetas.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/tipos_de_temperamento_en_psicologia.pdf
    • https://static.usrfiles.com/ugd/4bb894_225a9d8a927646a5a508f701e6d749cb.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_550c7149cf354088a3675140943f5f49.pdf
    • https://static.usrfiles.com/ugd/b8c837_f166e2c1d215496f9fdefdc1a5be1c93.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b5273dffdb441f7a8ceb13b5a741aba.pdf
    • https://cdn.shopify.com/s/files/1/0438/4705/7568/files/sample_python_programs_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/rexasomenaluk.pdf
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/9775006202.pdf
    • https://cdn.shopify.com/s/files/1/0438/4840/1046/files/aliments_ferments_aliments_sant_mthodes_conseils_et_recettes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8017/9093/files/synonyme_de_formule_banale.pdf
    • https://cdn.shopify.com/s/files/1/0447/8536/9239/files/alfalfa_hay_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/98624427686.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/fernand_raynaud_le_douanier.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_off00006323.bin
ffca936d4c8182ddaec054baf186b08a9e031522dc4ca1b61d3535789af6bf12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 5340 bytes
font_01_sfnt_off00007522.bin
8864684a36208647114871d4ce83ef92b7132b8c36e62d0103d255c3eb7b5907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7522 10956 bytes

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