Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07ec0e79b80e3a1…

MALICIOUS

PDF

54.7 KB Created: 2020-08-28 16:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2335056e62e3a2155db63b390a1a9484 SHA-1: 3f9abebb16786bab417a5de0d7a20de0707ae88a SHA-256: f07ec0e79b80e3a13b6e4ce1b2099a63f6e7445b8b3c2f5fe11863859baf9cd0
154 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 pointing to Shopify domains, but one critical link redirects to `ttraff.com`. This indicates a link farm designed to obscure the ultimate destination, likely a malicious site. The ML classifier strongly supports the malicious nature of this PDF. 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.com/pify?keyword=aro+orientation+book+pdf
    • http://venepugav.trekking-romania.net/uploads/1/3/1/1/131164250/db86b988.pdf
    • http://files.thirstforknowledge.ca/uploads/1/3/0/7/130738622/zenezarajesiti.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/83261098235.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/dijolibobevipukemu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2435/8298/files/6993259622.pdf
    • https://cdn.shopify.com/s/files/1/0462/2440/8730/files/virazo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7709/files/83224269062.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/89603933833.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/algebra_1_regents_review_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/7702/6463/files/96711021946.pdf
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/63970128767.pdf
    • https://cdn.shopify.com/s/files/1/0445/3348/1636/files/aushadh_darshan_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/joduwijivezesukirezumo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/jevavufinarajala.pdf
    • https://cdn.shopify.com/s/files/1/0429/3830/2627/files/50493464266.pdf
    • https://cdn.shopify.com/s/files/1/0447/5407/5799/files/nurodumarij.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ba9.bin
25c2a0db7e98d2a0acd725beb5790c5a7b70571572f061ac28d30ef564cc358b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA9 5016 bytes
font_01_sfnt_off00007cc1.bin
7f5e9d44779f8dbffd3225100b12149c63b9ae185c3b2dadbdcf6e7d0a4128b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC1 7512 bytes
font_02_sfnt_off000093eb.bin
8977f865e0392dc12ea4d1b54ec2ada2e9899acf7fe41ce6bfecfc771ebe4880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93EB 10316 bytes
font_03_sfnt_off0000b75a.bin
35ad8c2472189429d5cf46e08b7640bd909defb34b627552b7c49c3ad9b8cbaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB75A 16336 bytes

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