Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d23eae86902d03…

MALICIOUS

PDF

40.8 KB Created: 2020-09-02 12:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c0c562a912356f8e15b6ad1ee81e2b SHA-1: 908cceef1a60858f55eef94749ec493cf940a6e9 SHA-256: 59d23eae86902d0328035d8534406c4651daa203da8985a3cad4ebcba40b0cc0
154 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'lfn ir sensor datasheet' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to external sites.

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/wix?keyword=lfn+ir+sensor+datasheet
    • http://www.Datas
    • https://cdn.shopify.com/s/files/1/0438/9493/1624/files/hematology_report_abbreviations.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/lesson_plan_for_speaking_skills.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2821/files/galisenezumajikamemenawe.pdf
    • https://cdn.shopify.com/s/files/1/0461/7427/3699/files/89797908027.pdf
    • https://static.usrfiles.com/ugd/70a38d_b17e120b1dfa47688b08a4c251c67bb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_acbfa7ca3b9c4fe9a85350a59f8da039.pdf
    • https://static.usrfiles.com/ugd/74c34a_7db7693283524cee92c617e2999e3933.pdf
    • https://static.usrfiles.com/ugd/c6ac46_b7ac2edcefc14ea0a5624c0748c5d8e6.pdf
    • https://static.usrfiles.com/ugd/d775a9_4b2db65554d5445daceed80b3fc809ae.pdf
    • https://static.usrfiles.com/ugd/a48928_4330e425b0744b4d8e126cd1dd211b34.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c5d0e8ef8cc449fb11bb7d577dc25a8.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/ligifozada.pdf
    • https://cdn.shopify.com/s/files/1/0459/2556/4583/files/zisora.pdf
    • https://cdn.shopify.com/s/files/1/0446/9365/1610/files/brisbane_metro_map.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053a2.bin
92da5d81032d83a6b9f70ee33f2949aba8dd761a8b22b63e36b0f5b6c798f892
pdf-font-stream PDF embedded font (sfnt) at offset 0x53A2 3952 bytes
font_01_sfnt_off00006194.bin
d7c917e416db938a24ae154506e9efb18df1362ee062f97a6d15542141583c01
pdf-font-stream PDF embedded font (sfnt) at offset 0x6194 4904 bytes
font_02_sfnt_off0000723e.bin
c68c28672b9df2b6a9688707709d25b2edfa06d52ab98f9230f61c6bcb38bce0
pdf-font-stream PDF embedded font (sfnt) at offset 0x723E 10580 bytes