Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f302ff60124ded9…

MALICIOUS

PDF

41.7 KB Created: 2020-08-02 20:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d45affdfb370fb42a467cdba40b44a7f SHA-1: 69306be9227b0bf65912284909620e2a744cc4ef SHA-256: 6f302ff60124ded9615d7f52c005be2bb6a31b6709e07dc7df76421ed63e89bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users to external sites, likely for phishing or to download further 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.cc/pify?keyword=javascript+array+reduce
    • http://files.sunbonnetsuequiltclub.org/uploads/1/3/1/3/131379803/sajotefipor-mixutofoxojemu.pdf
    • http://files.cvbigreds.com/uploads/1/3/1/3/131384663/tuwasemi.pdf
    • http://files.misscarolineward.com/uploads/1/3/0/7/130739614/be519.pdf
    • http://files.michellekhuu.com/uploads/1/3/0/7/130775734/8909918.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/lenorewobojeju.pdf
    • https://cdn.shopify.com/s/files/1/0431/4490/4855/files/nosupipufaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/8921744788.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/41814194713.pdf
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/form_5498_turbotax.pdf
    • https://cdn.shopify.com/s/files/1/0434/7455/0949/files/44526565966.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3531/files/popigamowowumeper.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/21673953907.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/85204738480.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/50820247245.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_off000065b6.bin
131f2b0fc5c7eae04dd89c658722fd39780118cc43a226a607eec509733f7f61
pdf-font-stream PDF embedded font (sfnt) at offset 0x65B6 5188 bytes
font_01_sfnt_off00007780.bin
718bb48b75edf898b14a73d5f32ef635be39c92510d5cf3cee6fb0961fb0a37b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7780 10112 bytes