Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4698c1fc2a8539…

MALICIOUS

PDF

47.1 KB Created: 2020-08-01 12:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cea78cff6770163daebcc1294cf830ac SHA-1: 61d19c48722cbbcf1464aea68323b461f06b4799 SHA-256: 0a4698c1fc2a85395ce9ebed858ebfd7a4163351af91a4b8f454ee958229d1ea
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a manual that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL `https://ttraff.cc/pify?keyword=evinrude+88+spl+manual+pdf` is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

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=evinrude+88+spl+manual+pdf
    • http://files.jeremybraden.com/uploads/1/3/2/3/132302859/sovak-jitixowebirew.pdf
    • http://files.latechhub.org/uploads/1/3/1/0/131070845/nekuwubofisi_rezukixeje.pdf
    • http://files.traventuring.co.uk/uploads/1/3/1/3/131379054/rixuxukag.pdf
    • http://files.katrinadasilvaart.com/uploads/1/3/0/8/130874250/tirufi.pdf
    • http://files.creative-works-intl-media.org/uploads/1/3/0/8/130814288/78449db85cd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/zatitas.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/soragag.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/nopukuwezoneziduzejaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26225030347.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/kakujonafipixebigibifo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9397/3405/files/75392492284.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/nifalafatawoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/22085462057.pdf
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/tekomiwosidemeto.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/jedukoxepelomasin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21617342462.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_off00007a05.bin
fce2e83ecfbf2bff13222534a79b8ba44fc7f61368374a3890025dc32727a897
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A05 5400 bytes
font_01_sfnt_off00008c58.bin
dba3b93faabf0b40b644efacf4db2353fc28650786e69bdaf398f5433397e5b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C58 10384 bytes