Malicious PDF — malware analysis report

Static analysis result for SHA-256 152a69b623da174a…

MALICIOUS

PDF

35.2 KB Created: 2020-08-08 10:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ec659c329e2c92d4d15cd89aaf39774 SHA-1: e28812d0098d4991f05b72b7071c947ce9a38c40 SHA-256: 152a69b623da174a96afd784d14bc34dbb7c41748a34fab872bf1a0a25df7bef
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text that suggests a lure related to 'logical assumption exercises' and includes the malicious redirector URL. The presence of many external PDF links, some pointing to benign Shopify domains and others to unknown domains, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=logical+assumption+exercises+pdf
    • http://files.zulfiamade.com/uploads/1/3/0/7/130739616/6204767.pdf
    • http://files.thelegocasestudy.com/uploads/1/3/0/8/130814630/5956506.pdf
    • http://files.stpaulpensacola.org/uploads/1/3/1/1/131164573/2034725.pdf
    • http://files.lightninghill.net/uploads/1/3/0/7/130776208/6a10decdc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1617/4243/files/limawe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/85437157525.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/39505297400.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/31738798517.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5857/files/padaziwisiwibixuxoti.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/playground_sessions_crack.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/59284249305.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/gitojoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/mechanism_of_muscle_contraction_and_relaxation.pdf
    • https://cdn.shopify.com/s/files/1/0430/7697/6791/files/doparax.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/zujalig.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/29360720617.pdf
    • https://cdn.shopify.com/s/files/1/0435/5063/8229/files/traditional_payment_system.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_off00004ad3.bin
a07fa045644034b6e1a91080dd4d583465d4594033e493c9f6f9eda4509c1d99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD3 5484 bytes
font_01_sfnt_off00005d76.bin
b16abea1fb6e1e2c32ee6fffd869c450a0af577b988528d0c1d8e76e38ccd273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D76 10368 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.