Malicious PDF — malware analysis report

Static analysis result for SHA-256 a061a1667251e978…

MALICIOUS

PDF

42.7 KB Created: 2020-08-05 23:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e59686b2c9417ff2aefdfb7d9f72e220 SHA-1: b333702c4c9d2efb25ea812f1cb54d0600192fa5 SHA-256: a061a1667251e9785e890131cd15d5a37964d68315c1815a41aef57b67a45ee1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, suggesting a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of a malicious redirector and a large number of external links strongly indicates a malicious intent.

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=datasheet+pdf+1n4007
    • http://files.fryfamilyfoundation.com/uploads/1/3/1/3/131398085/vemaxakozu_wexibel_ditile.pdf
    • http://files.buildaseries.net/uploads/1/3/1/0/131071137/susavafuduta.pdf
    • http://files.wellingresearchlab.com/uploads/1/3/2/7/132740707/d075bf90f6c.pdf
    • http://files.mermaidscoin.com/uploads/1/3/1/4/131411474/nolubufebusimu_rokoro.pdf
    • http://files.reasonandjustice.com/uploads/1/3/1/0/131069789/samug.pdf
    • https://cdn.shopify.com/s/files/1/0439/1046/3643/files/busisifoxurejivotelanigix.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/jezipumimo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/bupijixagilikumanajaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49181926903.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/26007622638.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/joziduserorase.pdf
    • https://cdn.shopify.com/s/files/1/0436/7391/1449/files/rejiwifijubese.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/ziresox.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/80138646689.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5522/files/electrical_engineering_fe_review_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/64606124575.pdf
    • https://cdn.shopify.com/s/files/1/0433/6995/5486/files/lujudupemov.pdf
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/wexedazigevenebowajobefa.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_off000068db.bin
201a3e690e12cc3f604b58bb5c0a90804fe3f78d7084a7156a3c692b1e334e5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DB 5364 bytes
font_01_sfnt_off00007b31.bin
08716f21120ffee0a7888c7a5c962aadd0f622fae74f1d443cf88eead044934a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B31 10244 bytes

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