Malicious PDF — malware analysis report

Static analysis result for SHA-256 6635c220c34b314a…

MALICIOUS

PDF

45.4 KB Created: 2020-08-21 20:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfa500e5111db255410f6fd4d2b28d28 SHA-1: e2cb96411cbaa7f61d1d14b4de1c24559d608f90 SHA-256: 6635c220c34b314ac523a9f16d87f71a7f7814131ca34654fd78d81f3eb82147
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous external links, many pointing to Shopify, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests an attempt to leverage SEO or a deceptive topic to drive traffic to malicious infrastructure.

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/pify?keyword=jingle+bell+rock+piano+sheet+music+hard
    • http://files.learningslowly.co/uploads/1/3/0/7/130776262/kadexe.pdf
    • http://files.michaelkateboutique.com/uploads/1/3/0/7/130775244/c30178691f1c62.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/48020671085.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/48018866979.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/17076316482.pdf
    • https://cdn.shopify.com/s/files/1/0435/5388/2280/files/26268526623.pdf
    • https://cdn.shopify.com/s/files/1/0435/8602/7677/files/76389357905.pdf
    • https://cdn.shopify.com/s/files/1/0450/9057/0405/files/compress_mac_software.pdf
    • https://cdn.shopify.com/s/files/1/0434/6046/0701/files/91855900530.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3061/files/79909120724.pdf
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/zubulaxudorinakupew.pdf
    • https://cdn.shopify.com/s/files/1/0434/3922/7047/files/powomalomu.pdf
    • https://cdn.shopify.com/s/files/1/0451/3467/6133/files/design_thinking_process_and_methods_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8124/4573/files/tawulaluwijoforolep.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/sanaxamidapoxig.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000635d.bin
1641db788da6f62063dee83af845357b350d680ad9fa19e33267c697fd01dd9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635D 5560 bytes
font_01_sfnt_off00007600.bin
4657807990608c77d29d0f6ce4eb98b667a71c5d8dfdc9af57d3141429bb95dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7600 10640 bytes
font_02_sfnt_off00009a6a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6A 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.