Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e8a3365574be79…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 00:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34ef05ebf5fcb81b789a1ae427232144 SHA-1: 7191f6a6be02434b8a89de443b7684d9160f7973 SHA-256: 70e8a3365574be796d2dc9a609e4ac61383f23624ddf86d8cd7d3fa11781c472
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as headphone instructions, which is a common social engineering tactic. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, likely for SEO manipulation or to host further malicious content. The ML classifier strongly suggests maliciousness, and the embedded URL points to known 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.club/wix?keyword=ifrogz+bluetooth+headphones+instruct
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0452/7095/8241/files/chevening_scholarship_form.pdf
    • https://cdn.shopify.com/s/files/1/0459/6747/4855/files/41655564370.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/kadovilemakenaxasikod.pdf
    • https://static.usrfiles.com/ugd/22bf55_d702d005dca84f86b464b9f3f9a287e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_41ac5ccd51e14f04a62e0b6039b684e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_78aef49564a54b329de65c8ff2ba92c2.pdf
    • https://static.usrfiles.com/ugd/be19e1_62e9a91b5a6a480e92bc078796c2bc8f.pdf
    • https://static.usrfiles.com/ugd/ca300b_272b43b6c3a4495dba205dc33e104ca1.pdf
    • https://static.usrfiles.com/ugd/cc14e4_6c117262251a46ec953416c60e083e15.pdf
    • https://static.usrfiles.com/ugd/2b3f46_e29d245022624abb8e982f08f2f3e3dd.pdf
    • https://static.usrfiles.com/ugd/b28561_72142f2aebeb4e5eba1ce1adccee9a29.pdf
    • https://cdn.shopify.com/s/files/1/0457/8816/8358/files/bawujefigiwivifazavu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/bsc_math_honours_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4501/9045/files/fotefuwizemuburiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6670/files/44234315208.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_off00005da5.bin
e6b1236f8d6569dd0b86bd14ce67374c097dbbc0d8a64cc01287d5d1322508f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA5 5544 bytes
font_01_sfnt_off0000707f.bin
cedf7fe4f011675a290e14279444929c7b33e803a870d9d6998e3adc6dc7c206
pdf-font-stream PDF embedded font (sfnt) at offset 0x707F 10524 bytes