Malicious PDF — malware analysis report

Static analysis result for SHA-256 65470928d667a6cb…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 07:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e94442926002326895ba43357256d0b8 SHA-1: 7519d23dfae700c5cdf7a731bd0517758094d280 SHA-256: 65470928d667a6cbaedb2c8159c37b709d049b6017a38fda75aba000d7867c63
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a "grimm rpg pdf". The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the redirector link is the primary indicator of 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.me/wix?keyword=grimm+rpg+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/37923982865.pdf
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/leaf_invitation_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6634/9975/files/word_search_games_in_english_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3714/files/42679817442.pdf
    • https://cdn.shopify.com/s/files/1/0463/0488/6941/files/wild_cheryl_strayed_epub.pdf
    • https://cdn.shopify.com/s/files/1/0438/9978/1288/files/ifrs_interim_reporting_tax.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1703/files/pefoxojomemubinigijas.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/48118564072.pdf
    • https://cdn.shopify.com/s/files/1/0437/7280/5277/files/56298105484.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/dononelimogonusutejer.pdf
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/19890128278.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/64233963906.pdf
    • https://static.usrfiles.com/ugd/0a593f_529f073cbada4ad48370837d6c92c0a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b1a633001ce4af7bdc2582769e90779.pdf
    • https://static.usrfiles.com/ugd/906e9f_520045e5274b4315b0ca1d583335340c.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_off000069d1.bin
b1378280b6222a0c10bd5f3e6837b9f00d0fd40a466e51096b4817f3860ea2a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x69D1 4972 bytes
font_01_sfnt_off00007aab.bin
91e3aab8e87aab3eef4b9de9b931614173f215a6e1d53a15120b36fe64e6d791
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAB 10172 bytes