Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5e793526cbcd1b…

MALICIOUS

PDF

58.4 KB Created: 2020-08-28 05:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c95137f223a62e61ace6e3659d3a1e4f SHA-1: 35c587ab89f5afdc1bb05a7743e505c5daaf5728 SHA-256: 7c5e793526cbcd1b6a3dadaf0bf0c89c64c0b91809498627bb6687cafd964892
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO spam operation. One critical heuristic indicates a link to known malicious redirector infrastructure at 'ttraff.cc', which is likely the primary malicious component. The ML classifier strongly supports the malicious verdict.

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=motorola+droid+bionic
    • http://vexos.wildernessrundachshund.com/uploads/1/3/0/7/130776046/mepopa_zujuderajimiti.pdf
    • http://zefomuwe.beejaysecuritydoors.com/uploads/1/3/1/1/131164250/xukeguzodupeti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/95414716605.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/pulse_position_modulation_and_demodulation_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5716/files/vanakexevujobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8732/2522/files/botany_textbook_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0437/0645/0074/files/sirarusufatixadiruj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0624/6557/files/77484939870.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6013/files/shadowrun_bioware_list.pdf
    • https://cdn.shopify.com/s/files/1/0438/4168/3618/files/18854388109.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/next_day_air_saver.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/33699123677.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/gigawokunafaxefobiguwulix.pdf
    • https://cdn.shopify.com/s/files/1/0438/7389/4555/files/lorain_county_dog_license.pdf
    • https://cdn.shopify.com/s/files/1/0440/7269/8006/files/java_hashmap_vs_hashtable.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_off0000a7de.bin
a8e43fc5a56e602d4d47b43734ba9cb1a3218fd0ec0252d000c3b2e74b89df0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7DE 4900 bytes
font_01_sfnt_off0000b898.bin
b66a7788b0d3a3939f98ef946b80f5b3ad63fb4c3932332902d558a732d49034
pdf-font-stream PDF embedded font (sfnt) at offset 0xB898 10604 bytes