Malicious PDF — malware analysis report

Static analysis result for SHA-256 531af720549a0d14…

MALICIOUS

PDF

49.1 KB Created: 2020-08-31 23:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3a997b641d058409c619932b21715f6 SHA-1: 1e40888afee587c5d9c4a16ea2e0cf66e1cee1e1 SHA-256: 531af720549a0d140d218fe00e94b0569b8c250469728ce65cfaa18c6c040463
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 pointing to 'https://ttraff.com/pify?keyword=embed+power+bi+report+in+dynamics+365'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic to increase visibility. 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=embed+power+bi+report+in+dynamics+365
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/xojibusilegiluxigele.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1276/files/81625703381.pdf
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/xipujusuza.pdf
    • https://cdn.shopify.com/s/files/1/0430/8896/9882/files/16465145636.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7239/files/tipiferitixogoperodat.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/chopper_one_piece_forms.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ginowojero.pdf
    • https://cdn.shopify.com/s/files/1/0441/0517/1096/files/buffalo_tftp_boot_software.pdf
    • https://static.usrfiles.com/ugd/eed56f_ec2ed2f9f3bc437b8009715a0e3736ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_632b364a7a88422b98969ff5ccf9022e.pdf
    • https://static.usrfiles.com/ugd/455f95_87affdb2c27149148ed64a161791d9fb.pdf
    • https://static.usrfiles.com/ugd/e4a001_7df421cefbf5496e9751b7c1f2c808c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcdcae093c5d4f0183a0be9bb8c53f65.pdf
    • https://static.usrfiles.com/ugd/58a813_3349a09fbe7945b280d8846e89367d9b.pdf
    • https://static.usrfiles.com/ugd/451461_e6581936bd6e4913ad73358c748bdfdf.pdf
    • https://static.usrfiles.com/ugd/88a84f_df30dffe20844f519a83e3721fcbbc9d.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_off000070e1.bin
3c1488c8e49eb7dc249b32120c4f24ea1ccfd017814927a24e7b7eebdbd6f5ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E1 5708 bytes
font_01_sfnt_off00008440.bin
159f988d8b67423b375e93eff453ae89e4d09ea8050ff0c04471a7c96b0aa572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8440 11040 bytes
font_02_sfnt_off0000a969.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA969 4324 bytes

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