Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f653b1daf460e8…

MALICIOUS

PDF

51.2 KB Created: 2020-08-10 02:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f120e03588649ed6488b9ff35de7cdf1 SHA-1: f58f8c3f24590a44642776941e3c4105d88ec98e SHA-256: e3f653b1daf460e8905d29383f6959c51f5d49b055856061607b6d58a61fe857
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one specific URL, 'https://ttraff.com/pify?keyword=alberta+boating+license+study+guide+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Alberta boating license study guide pdf', suggesting a lure to entice users to click the malicious link. 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=alberta+boating+license+study+guide+pdf
    • http://files.kidstocktheater.com/uploads/1/3/1/8/131871586/vopezijemomul_wazukuzutim_xiwixudozo.pdf
    • http://files.mindnetwork.us/uploads/1/3/0/7/130776521/b848d3a23a.pdf
    • http://files.andreapulido.com/uploads/1/3/2/6/132681690/zulosofifur.pdf
    • http://files.kbsail.org/uploads/1/3/1/4/131407148/1493628.pdf
    • https://cdn.shopify.com/s/files/1/0440/1371/5606/files/digital_business_concepts_and_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/diganesarajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1163/6381/files/international_players_anthem_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/boreseketakepitanerez.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/6934778802.pdf
    • https://cdn.shopify.com/s/files/1/0431/7121/7565/files/73525505180.pdf
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/29557561388.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/rationalize_the_denominator_practice_problems.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6818/files/john_deere_111_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9204741539.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/bewoloxezidotifiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1013/files/bejirepimetukig.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ac5.bin
a0eb69d65a29c29022f64b5edd72ebd08c13c39ec0315187fe086b1bc8ce8bfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC5 5436 bytes
font_01_sfnt_off00008d4d.bin
c79a78e27b6d3ec34184ea4add328515c374148b77cf7437011a8ea88ca781da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4D 10596 bytes
font_02_sfnt_off0000b190.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB190 4324 bytes

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