Malicious PDF — malware analysis report

Static analysis result for SHA-256 674564c6dc22f73a…

MALICIOUS

PDF

49.1 KB Created: 2020-07-29 15:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d8ce8e41a0a7b5d1b96bc85ab1c7f69 SHA-1: ea00b8b09969baa55d91c17d689f8a9a36ff17f9 SHA-256: 674564c6dc22f73a9442c67f558d0f9fe09246ecbd682ed95e76c9ec03a41d11
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of numerous links suggests an attempt to lure users to malicious sites, potentially for phishing or malware distribution.

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=chacha+chaudhary+stories+in+english+pdf
    • http://files.passionhouseconcerts.com/uploads/1/3/1/3/131381706/6130580bc61d63.pdf
    • http://files.wah28.com/uploads/1/3/0/7/130776413/754898.pdf
    • http://files.honkrenaissance.net/uploads/1/3/1/0/131070520/3578f9490c503.pdf
    • http://files.bostons4littlepaws.com/uploads/1/3/0/7/130739251/puxuwuguwuxa.pdf
    • http://files.artofashesamuels.com/uploads/1/3/0/8/130814630/garebig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6074/7688/files/xeximut.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8591/files/gevezufovukuwubed.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/vidowe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/34387172355.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegofegomena.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6885/files/vikefajemaxuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/zusobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/fagonagejixunususovek.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/luxiraxaduvinexonikumeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/1759065628.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/xemaromisasidusonexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.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_off000082d3.bin
10aa7c094350e14b9eaa5885556ef99556d594855e8164ba23aa2aa0dcaa46ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D3 5424 bytes
font_01_sfnt_off00009549.bin
27a67fbd83b297a27669018029ed77b8fa3399b70dda672da3fab974fde93c9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9549 9924 bytes