Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e18fffe4d9d65d…

MALICIOUS

PDF

46.3 KB Created: 2020-07-31 07:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a54314e677f37871e0c273aadbd24556 SHA-1: 8b5a50c1e94a5d7d969bd0a90c645aa04b890c9f SHA-256: 60e18fffe4d9d65d47983fc76f1fdb17d2495ac6fb9c9444f409105b3c974183
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of a malicious redirector and a large number of external 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.com/pify?keyword=temperament+types+test+pdf
    • http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdf
    • http://files.msmohp.com/uploads/1/3/1/6/131637374/ganisotigavegodijol.pdf
    • http://files.briannesandersphotography.com/uploads/1/3/2/6/132681482/madodu-bepufotabigilav-xebex.pdf
    • http://files.bethshalomtemple.com/uploads/1/3/2/7/132740743/jejumidasilo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/92727660786.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/kodojitexatuligozexujiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/fadazudigezijimaxukinago.pdf
    • https://cdn.shopify.com/s/files/1/0433/8860/0478/files/wumezegikokubaleniminomob.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/86447423982.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/nakarobawobod.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/gulisi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/bukijivovunafexeduju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.pdf
    • https://cdn.shopify.com/s/files/1/0431/5932/2773/files/nuromupegewibanunemilux.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/67873690755.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_off0000798c.bin
d6b2cf5352083943f3324e0b68225f749084a1d73aae9d09a6a10892848a6045
pdf-font-stream PDF embedded font (sfnt) at offset 0x798C 4836 bytes
font_01_sfnt_off000089d7.bin
b6b5f54e86b2b22390b81f90cbf7c10ccbd18ee6cf213ade5edf32da13606277
pdf-font-stream PDF embedded font (sfnt) at offset 0x89D7 10008 bytes