Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2829da29d634a90…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 14:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdcfd05fc908817f9c19a5850be6e11e SHA-1: 20fb06ee2b173ad8ce271218322126d7e85df6ec SHA-256: f2829da29d634a90bbc98138f2674fcbecee98dfe029b1b9aee3a429dfb3055c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many of which point to a link farm hosted on cdn.shopify.com, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=breathing+lessons+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, potentially for further exploitation or phishing. No scripts were extracted, and the document body was heavily obfuscated.

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=breathing+lessons+pdf
    • http://goriviwow.christopherwrench.com/uploads/1/3/1/4/131438477/2362604.pdf
    • http://files.nitaraashling.com/uploads/1/3/1/8/131871786/bidoxoludine.pdf
    • http://basal.saansw.com/uploads/1/3/0/8/130814328/gepiwimegexav_telizirugorefez_kanidavak_jenujuwukotatag.pdf
    • http://files.bensonstreetstudio.com/uploads/1/3/2/8/132815767/87dc3df64a5d4.pdf
    • https://cdn.shopify.com/s/files/1/0447/9886/9653/files/antiphospholipid_syndrome_nejm.pdf
    • https://cdn.shopify.com/s/files/1/0427/7331/5740/files/4568965990.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/clases_de_piano_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7815/files/77286495145.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/matter_and_interactions_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0448/1817/0018/files/zasawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/50904437575.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/job_alert_app_free_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/tafubejozutikimovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3358/2998/files/sogizuwivi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/product_certificate_of_conformity_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/cephalometric_analysis_book.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a3.bin
c19d09524e66e713b946c1e734c0b843c0e957dfc9b9889d766d3b3ad59a7914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 5352 bytes
font_01_sfnt_off000075ce.bin
1fb3dda2023a59e73abfccf08e70c01fa4ec83bd286f8f2e28f1a673a4b25955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CE 10188 bytes

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