Malicious PDF — malware analysis report

Static analysis result for SHA-256 20097ed54e8dca7a…

MALICIOUS

PDF

53.3 KB Created: 2020-08-16 14:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31e61ae37abecb38ffdc516694aa6a8c SHA-1: e463fa2c630cf222cc36c1d57eb96c9c6f96c1b7 SHA-256: 20097ed54e8dca7abd8750d37817ba6c5334cb6113ab60bb5e28da4c57591598
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. Additionally, it contains a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning attempt. The primary malicious URL identified is https://ttraff.cc/pify?keyword=wapking+full+hd+video+songs, which is likely used to redirect users to a malicious site. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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=wapking+full+hd+video+songs
    • http://levuzali.gowersartclass.com/uploads/1/3/1/4/131454106/munuze_lojepijoka.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3990/files/engineering_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/mavikubowow.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/56010118781.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/pomunuvusejifaxudefuvam.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5736/files/gerawenabufofuxitogimel.pdf
    • https://cdn.shopify.com/s/files/1/0433/4646/0830/files/foragelemokakowekomuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/77512155024.pdf
    • https://cdn.shopify.com/s/files/1/0432/5251/4971/files/68030695333.pdf
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/wemudakesojewusopodoxape.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fe2.bin
28842fa9ea121a7dc0f3a2003673d2935377343b5decc7ce0502153d9264cb52
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE2 5344 bytes
font_01_sfnt_off00008221.bin
40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8221 3720 bytes
font_02_sfnt_off00008d83.bin
76010ee0ebc620b1768a12d5467df6f90ada8cfe485eae7a575cfa00ce1a115d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D83 11480 bytes
font_03_sfnt_off0000b366.bin
287ceaf5e3c8facf5b66a694a670522dfa249bf6763fb942a747490f59f46120
pdf-font-stream PDF embedded font (sfnt) at offset 0xB366 5976 bytes