Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dfaf0676fd44e48…

MALICIOUS

PDF

39.9 KB Created: 2020-09-02 00:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e70da0514c3bfcd28c502eca7e41f32a SHA-1: 263c7f79326755e152ebf88bd0166cfcdba24541 SHA-256: 7dfaf0676fd44e488903adb38d7b629f133a929d70168e2a1de46cbb4e3c2516
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a malicious redirector link disguised as a download for 'app cloner premium apk 64 bit'. The document body and embedded URLs strongly suggest a phishing or scam attempt. The primary malicious URL, https://ttraff.link/wix?keyword=app+cloner+premium+apk+64+bit, is flagged as a malicious redirector, likely leading to further malicious content or malware download. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for malicious content.

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.link/wix?keyword=app+cloner+premium+apk+64+bit
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/polutexubenewokidegogero.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/11766237.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38030937597.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/tosusifasikoleje.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8927/files/real_estate_brokerage_agreement.pdf
    • https://static.usrfiles.com/ugd/0a052f_258cc2a60fbd4e8a82d9300bcd5994ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_70e854ce6a3d4db89aedaaf136a267a3.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/60621518147.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/sawabulabopofegipo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/66976165973.pdf
    • https://cdn.shopify.com/s/files/1/0438/5095/6960/files/ffxiv_target_macro.pdf
    • https://cdn.shopify.com/s/files/1/0464/1180/8936/files/fajofedobetovogabotuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/6117/2631/files/31954070384.pdf
    • https://cdn.shopify.com/s/files/1/0435/7524/7009/files/93176341021.pdf
    • https://cdn.shopify.com/s/files/1/0431/9041/9616/files/chiari_1_malformation_uk.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_off00005ef4.bin
eff50ec03fa39faa09c7c91242be03378ddd7427dba1cd6703a2bfd9e35c0a54
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF4 5336 bytes
font_01_sfnt_off00007108.bin
67f7ffc8b570a07c5ee8b876eacf22079541244bd864470f439529176797ee73
pdf-font-stream PDF embedded font (sfnt) at offset 0x7108 9920 bytes