Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c9b1176efe90dc…

MALICIOUS

PDF

61.0 KB Created: 2020-08-16 11:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20eaef98618f7fc500b4871ab2b55cd1 SHA-1: 3f90be4227aa7cc67f4fcd0cc6cba45a483bcebc SHA-256: 01c9b1176efe90dcdc8d2bc5168d71f3b07ced88ddcab8b71a1793f4b42f9204
154 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and part of a link farm, directing users to suspicious URLs. The embedded URL "https://ttraff.cc/pify?keyword=heart+system+pdf" is a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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=heart+system+pdf
    • http://xonuzar.shilohchristianband.com/uploads/1/3/1/6/131606758/wovamosujem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/sibemeleminep.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/63269069485.pdf
    • https://cdn.shopify.com/s/files/1/0436/2525/0974/files/jaralujifipipono.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/sonic_worlds_engine.pdf
    • https://cdn.shopify.com/s/files/1/0437/8574/8642/files/ionic_vs_covalent_bonding_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/1369/1799/files/66960809248.pdf
    • https://cdn.shopify.com/s/files/1/0434/6180/4197/files/13638373427.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/46392344081.pdf
    • https://cdn.shopify.com/s/files/1/0434/2480/9116/files/awaken_the_giant_within_you_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4194/7801/files/devi_bhagavatam_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/superheroes_chief_keef_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/the_eminence_in_shadow_raw.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_off0000b199.bin
c474dd40e24c579198a63cfb37d78a348df2e98c72b62d2e6606a93af83a5cdb
pdf-font-stream PDF embedded font (sfnt) at offset 0xB199 5220 bytes
font_01_sfnt_off0000c347.bin
d9c850e558a70eb762fd546dd3b9c63fe0cf582d1d9c1ecc9138481391dfd221
pdf-font-stream PDF embedded font (sfnt) at offset 0xC347 10608 bytes