Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f435583ea5061f0…

MALICIOUS

PDF

53.4 KB Created: 2020-08-22 09:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7734e5d428b321ce47b4e5c3dea7acb5 SHA-1: 1be38c0fcf4234dcbec348b845df1d1b1d42e6af SHA-256: 0f435583ea5061f044c0c007fff011252d01f8f37746abb2ce2eb3f1f19140e2
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL, https://ttraff.cc/pify?keyword=gigabyte+x570+aorus+elite+manual, is likely part of a phishing or scam campaign. The ML classifier also strongly indicated maliciousness.

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=gigabyte+x570+aorus+elite+manual
    • http://files.planetstompers.net/uploads/1/3/1/8/131856519/koxoma-kasaxobubabenap.pdf
    • http://gipagal.lethbridgeelectrical.com/uploads/1/3/0/7/130776783/079b902.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/public_administration_css_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/30159733559.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/malayalam_nursery_songs_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7222/4421/files/89640626204.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/jamuvovixokebowujo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8994/2945/files/palo_alto_movie.pdf
    • https://cdn.shopify.com/s/files/1/0437/2060/5848/files/vosafidosiwel.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5957/files/zawad.pdf
    • https://cdn.shopify.com/s/files/1/0438/8408/5416/files/ashish_singh_lecture._com.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_off000081cd.bin
d8e262c4ef1fb1f87a8ec38df16c09f02624478620b98c62d11c9ba0e7748086
pdf-font-stream PDF embedded font (sfnt) at offset 0x81CD 5572 bytes
font_01_sfnt_off000094ba.bin
55b3606810499c1607ec3b09eed213b7ccf568144ff3a8754f216e3b33d84e64
pdf-font-stream PDF embedded font (sfnt) at offset 0x94BA 10984 bytes
font_02_sfnt_off0000ba4c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4C 4324 bytes