Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddaa1cbaa7f9051…

MALICIOUS

PDF

42.8 KB Created: 2020-08-26 05:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2395dc6c5c51a70f1d1397556e93c69 SHA-1: 857b6d4665ec3c7298bd2c4358f989653bee4ed9 SHA-256: 9ddaa1cbaa7f90513911b71be638635d668eb27cdc586bafd2f566a2e9df5552
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=used+motorhomes+parts'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. Additionally, the PDF was flagged for containing a mass external PDF link farm, further supporting the malicious intent of driving traffic to external sites. The ML classifier also strongly indicated maliciousness.

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=used+motorhomes+parts
    • http://files.lightyearspress.com/uploads/1/3/0/8/130813668/9404f3032d36e.pdf
    • http://files.jakevzlab.net/uploads/1/3/1/6/131637853/b353aff0304c5.pdf
    • http://wawoze.michiganrealtysolutions.com/uploads/1/3/1/8/131856331/1938115.pdf
    • http://files.drneilvanza.com/uploads/1/3/1/4/131406960/jazopowesi-dubupodagigalaz-terowuwupu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3993/8970/files/altium_designer_14_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/workout_schedule_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/50013055437.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/sivuzin.pdf
    • https://cdn.shopify.com/s/files/1/0462/6903/8749/files/97686814342.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/30927143326.pdf
    • https://cdn.shopify.com/s/files/1/0439/7082/2302/files/11111246781.pdf
    • https://cdn.shopify.com/s/files/1/0444/0725/9302/files/zorumasoxebalewalarolif.pdf
    • https://cdn.shopify.com/s/files/1/0436/5297/2697/files/21094530178.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/three_way_anova.pdf
    • https://cdn.shopify.com/s/files/1/0430/2723/4969/files/nakirifutediwigunetipi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/miss_me_with_that_gay_shit_nigga.pdf
    • https://cdn.shopify.com/s/files/1/0436/0057/6669/files/7767785562.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_off00006a0e.bin
9626c59d6dcfa0721f36d0e73fbd6dfa7ae906cb8f110806e9f29aa6ab678601		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0E 5156 bytes
font_01_sfnt_off00007b6d.bin
c75bc604ba8fcbeeaf3ec1f4988bf04b85062620fd96bda12f42bb2e3cb8238a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6D 10236 bytes

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