Malicious PDF — malware analysis report

Static analysis result for SHA-256 054e2d3b03e223f0…

MALICIOUS

PDF

40.3 KB Created: 2020-08-18 16:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d412518b0b2aba554214e65f541832a SHA-1: 5930e258f19d178d7f057bb476ac2e0bf0da4e96 SHA-256: 054e2d3b03e223f0476e224489e4346898c2d916129d9d5fa26ca076af6eef60
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a 'Google app store for free' download. This is further supported by heuristics indicating a malicious redirector link and a link farm. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, 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=google+app+store+for+free
    • http://files.pamschultzgallery.com/uploads/1/3/0/8/130873899/tetojifive.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/9408/1687/files/mathematical_logic_a_course_with_exercises_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/40813693105.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/76917478167.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/52856113375.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/jasperreports_encoding.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/fijinozosike.pdf
    • https://cdn.shopify.com/s/files/1/0428/0742/7238/files/vuvub.pdf
    • https://cdn.shopify.com/s/files/1/0461/3698/3720/files/10010771204.pdf
    • https://cdn.shopify.com/s/files/1/0428/9367/2604/files/56147373289.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_off00005476.bin
f406387e1e9711bbc53f1b032925e98219b4e89040ab271c55812a7a1aed9571
pdf-font-stream PDF embedded font (sfnt) at offset 0x5476 4732 bytes
font_01_sfnt_off000064a8.bin
ad311b5cdef493d597a760b1aff796b4079a58838607075929e0dfd6ff204dec
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 10012 bytes
font_02_sfnt_off000086ef.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x86EF 4324 bytes