Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d162b5385c0494d…

MALICIOUS

PDF

125.0 KB Created: 2020-08-24 09:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3023639dc42b730d31822b1f6dc72c37 SHA-1: 3732755ca4f899e532964a2ea67ee6f0f75980ec SHA-256: 0d162b5385c0494dec7ff81a295b643554729b3e81011cb7ba0e9924b13eeace
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to an 'annual report'. The presence of embedded links and the ML classifier's high confidence indicate a malicious intent, likely for phishing or to serve a secondary payload.

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=intermediate+capital+group+annual+report+2017
    • http://files.justloseit.com/uploads/1/3/0/7/130776077/nowajerezukewakugu.pdf
    • http://files.gvequineassistedlearningcenter.org/uploads/1/3/2/6/132695915/gikos.pdf
    • http://dirurorob.artartmargaretcameron.com/uploads/1/3/0/8/130874565/waxaro.pdf
    • http://files.euphoriacalm.com/uploads/1/3/1/6/131636737/4772889.pdf
    • http://files.carsnc.com.au/uploads/1/3/2/7/132741339/tojelejagudofeko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/75053775866.pdf
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/jquery_detect_input_value_change.pdf
    • https://cdn.shopify.com/s/files/1/0440/0293/4942/files/88774281628.pdf
    • https://cdn.shopify.com/s/files/1/0428/9072/3487/files/79396907515.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/molimakoladixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/zuzefefixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9494/0573/files/access_a_ride_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/0196/9820/files/74671869278.pdf
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/jovewunamelulami.pdf
    • https://cdn.shopify.com/s/files/1/0447/9008/7829/files/elements_of_aerial_photography.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_off0001a31e.bin
6a12c29a860fef5507c3ea0d5ae1b73cab24c1905460f7e11ee42a7137a9667f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A31E 5560 bytes
font_01_sfnt_off0001b5f1.bin
afbb00c6b7c49999fef0c93a9af93d2bdef6baf08876fc95e39552775b825da9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5F1 15544 bytes