Malicious PDF — malware analysis report

Static analysis result for SHA-256 148e2c325747768c…

MALICIOUS

PDF

38.0 KB Created: 2020-08-25 08:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 920271ebf891973945c16a43d0170fb5 SHA-1: ec4b88cc8b7763d44e919fd70cfec8df74d4f139 SHA-256: 148e2c325747768c10b367abf103464888f704ea4cf85d8ad2629aa9ecd05b86
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including a critical redirector link to 'ttraff.com', which is flagged as malicious. The document body, though partially corrupted, mentions 'Anti virus smadav 2019' and includes the malicious URL, suggesting a lure for users to download potentially harmful software. The presence of many external PDF links also indicates a link farm, a common tactic for SEO poisoning and traffic redirection.

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=anti+virus+smadav+2019
    • http://kojowogij.vintageedinburgh.com/uploads/1/3/0/7/130776102/jexokasewazelar.pdf
    • http://fusasix.hillsburghbaptist.com/uploads/1/3/0/7/130775075/d1fe62.pdf
    • http://files.lgbtqdemsmoco.org/uploads/1/3/1/0/131070313/lodesijijin.pdf
    • http://files.quentaron.com/uploads/1/3/0/7/130775747/gegivekizuxutokuv.pdf
    • http://files.estruckmuller.eu/uploads/1/3/2/6/132682989/vebimufebo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8072/9251/files/brkform_och_blandad_form_elevspel.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1276/files/abstract_test_samples_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0437/0842/files/tobibilojiron.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/55462766621.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/xegalavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/caracteristicas_del_temperamento_sanguineo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/68535078282.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/87714543000.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/nisitap.pdf
    • https://cdn.shopify.com/s/files/1/0440/1024/2198/files/blackberry_android_phone_latest.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/topographic_anatomy_of_man.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_off000057cf.bin
568176e81490cbce6069eaf6e275709f9d870b921e4930769f4dca814f1080da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57CF 5472 bytes
font_01_sfnt_off00006a4f.bin
ba0febf7dffc1631c30b4bb3392e56568d58cbac7f1e1f0068e9dd678c4bc810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4F 9732 bytes

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