Malicious PDF — malware analysis report

Static analysis result for SHA-256 7169811502d88753…

MALICIOUS

PDF

56.5 KB Created: 2020-08-14 05:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccccf716c9ec0551f82fd09622d32105 SHA-1: 0570e22063718b2ff310c5bbb7b9248c2ba1f294 SHA-256: 7169811502d88753de33677a6ba8e56284b7a64162ebcd9292bbf79c1489a967
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating an attempt to lead users to malicious content. The embedded URL and the document body text, which includes a search query, suggest a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious.

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=desha+bhakti+songs+telugu
    • http://files.creativeendeavorswithmegan.com/uploads/1/3/0/7/130739353/tudelubikemeraf-bovosunavodab-losabal.pdf
    • http://files.connectiveimpact.com/uploads/1/3/1/3/131379382/f8b5eb.pdf
    • http://files.kwongwingkwan.com/uploads/1/3/0/9/130969500/3739562.pdf
    • http://files.thewillowtreegifts.com/uploads/1/3/1/1/131163635/buxene.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/jotegavebitomeke.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5290/files/mugijasumutavebutagomere.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/57752345600.pdf
    • https://cdn.shopify.com/s/files/1/0437/1513/3605/files/sowakegovozosaduwuselexat.pdf
    • https://cdn.shopify.com/s/files/1/0437/7998/1470/files/electric_circuits_10th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7088/9896/files/zopowizoni.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/52877048505.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/11708533423.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7527/files/retardation_test_on_dc_shunt_motor.pdf
    • https://cdn.shopify.com/s/files/1/0441/2994/3704/files/best_kits_in_fifa_16.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/76030442655.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/46618220471.pdf
    • https://cdn.shopify.com/s/files/1/0435/0479/5800/files/zebolotakawanebadaz.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_off000098aa.bin
a2a6d0880fe2b7d84eb6adf1de652e7ea67e8e31c6f25c8beec554f4be7fba32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98AA 5052 bytes
font_01_sfnt_off0000a9dc.bin
375fb8d2ea9f811420c69726b6207120db2177ca1053a44215c8f578fea776ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9DC 13844 bytes

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