Malicious PDF — malware analysis report

Static analysis result for SHA-256 2effd7bd54eb0347…

MALICIOUS

PDF

33.8 KB Created: 2020-08-29 03:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8156c36cecbc40c8af54f80cfd64553 SHA-1: 88567089dc7379a8e4f09590fa45a1ab2cfc59f5 SHA-256: 2effd7bd54eb03475ba6babe3fc9925a00004ea539b228fbfe5f596056b993d4
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially garbled, includes the phrase 'G shock 6900 manual' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, further supporting the malicious intent.

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.com/wix?keyword=g+shock+6900+manual
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/tamil_nadu_ncert_ancient_history_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mofofuledezenededur.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/lonovukewezunifabijazog.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/inglourious_basterds_mp4_free.pdf
    • https://cdn.shopify.com/s/files/1/0451/6813/2250/files/94256383333.pdf
    • https://static.usrfiles.com/ugd/b8c837_1df8a0a6591542ecab335419ce362a40.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec46b9046ca94cfe850ab314226bdc4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1334d9999e1d4ad9a5b3e24b57c48ae5.pdf
    • https://static.usrfiles.com/ugd/b8c837_73f27eb718514f14964a172096bfde1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_808dcbcd55bd42d580d2a6857c57554a.pdf
    • https://static.usrfiles.com/ugd/b8c837_9947050d62384407bd39a6aeef7e5bc2.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/blank_outline_map_of_africa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6798/8376/files/wajuxadebaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/rilopu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/buboxej.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000469b.bin
bc3c51ba73011f4c31db5d899d9a33204211c3ab814f41db329f53d9a6f62733
pdf-font-stream PDF embedded font (sfnt) at offset 0x469B 5492 bytes
font_01_sfnt_off0000591f.bin
253fd48e186d0d4e26f72feea1a5cf0806ed25390f7987651365540e139001aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 10036 bytes