Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ef21abc5d0e476…

MALICIOUS

PDF

43.5 KB Created: 2020-08-24 14:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aed988116ca55f6d36cb27a31a46448 SHA-1: e31014a555a985d53de0a1d465ca87ab4c62be97 SHA-256: a7ef21abc5d0e476959f08fb96609a1b190e9d443e30c21b814deff6542f98d2
152 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 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify but some point to unknown domains. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to the 'ttraff.com' URL by presenting it as a business model template.

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=business+model+template+canvas
    • http://ruwatu.wearefocalshot.com/uploads/1/3/0/7/130739564/vorimuz.pdf
    • http://files.lindashiphopstreetdanceclass.com/uploads/1/3/1/6/131606719/8414916.pdf
    • http://files.alplatocpadmore.com/uploads/1/3/0/8/130874091/ziwesajuvigux.pdf
    • https://cdn.shopify.com/s/files/1/0438/6347/4331/files/34468596467.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/mahalaxmi_calendar_october_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/basic_tenets_of_christianity.pdf
    • https://cdn.shopify.com/s/files/1/0428/9704/7718/files/75571723077.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/sesixuzolozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/kileginomuvupumobepa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/kozifumivisirufu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2383/4024/files/billy_talent_1_full_album.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/vubekanoselipufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/damegadunuje.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/brothers_in_arms_3_mod_apk_revdl.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/moonchild_aleister_crowley.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_off00006a7c.bin
05e8acf5fadd4085796d950bfdde631e701d0d7c9a3007e621e983d16498f9ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7C 5232 bytes
font_01_sfnt_off00007c37.bin
db8aad26d00de81ec2e499ab96269926a5efd5d81657d996ce3f5f3894032ac7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C37 10836 bytes