Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2cdc6f484d6b39…

MALICIOUS

PDF

48.7 KB Created: 2020-07-31 01:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e04a5c104efa27e695b3e752ec7737f9 SHA-1: fc296479ec645a46797a709dd48a73fbc51266bc SHA-256: fe2cdc6f484d6b39e784bb04c76721f0bb33682326f1d0c229fcb6012d5c996f
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is part of a link farm strategy. The document body, though heavily obfuscated, contains text related to 'sop for calibration of weighing balance pdf', suggesting a lure. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=sop+for+calibration+of+weighing+balance+pdf
    • http://files.apothicoils.com/uploads/1/3/0/9/130969471/xovokujasusiwa_xaganonev_kutad_donaw.pdf
    • http://files.myholidayplace.co/uploads/1/3/1/1/131163599/9095000.pdf
    • http://files.dollargeneralpennylist.com/uploads/1/3/1/1/131163953/59733249549d.pdf
    • http://files.greenspawholesaleproducts.com/uploads/1/3/1/4/131452741/soruvaz_sanokibine_tivaluden.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/31968454024.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/86904007041.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/voboju.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/penizufakeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/34989530739.pdf
    • https://cdn.shopify.com/s/files/1/0440/3609/6150/files/64829487311.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/tivutalaxofurumofame.pdf
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/supag.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/15079416957.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/12665542460.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/36183945114.pdf
    • https://cdn.shopify.com/s/files/1/0435/0921/9492/files/rebenilovubofasepepoxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/demenesojudo.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_off00007692.bin
875de2282bcc146cbb50158b54b6b42c968bd723ffe0840d70fe8cb189260c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7692 5360 bytes
font_01_sfnt_off000088c6.bin
fe8e36c38a087e0161491e408201d58055a4562c211494e9753abc7b209bd004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C6 14232 bytes

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