Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c3ac6e887e2399…

MALICIOUS

PDF

60.8 KB Created: 2020-08-23 15:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e65687573147cdd8165b41b01c1faef9 SHA-1: da43446425dec63b5320640fa16a9bf76bc0d42f SHA-256: d9c3ac6e887e2399d43ba13f23e51b0fed3daea494160e18e085fae7b2807c4f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, embedding numerous external links, many hosted on Shopify. The document body, though partially corrupted, contains the same malicious URL and references to other Shopify-hosted PDFs, suggesting a lure to a malicious site disguised as a technical document. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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=electronic+ignition+system+using+contact+breaker+pdf
    • http://files.nagelhomedesigns.com/uploads/1/3/1/4/131406412/925d5dad7f.pdf
    • http://files.syncalliance.org/uploads/1/3/0/7/130776645/somesa.pdf
    • http://files.mydearellie.com/uploads/1/3/1/4/131406036/buxiwibewatiwi.pdf
    • http://files.silverstreetlutheranchurch.com/uploads/1/3/1/3/131398268/losot.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/45956580787.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/jutuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/javascript_check_if_item_in_array.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4162/files/76729387225.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/odisha_b._ed_entrance_syllabus_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/38924258286.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/25854659320.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/kenukibow.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3521/files/traditional_bowyer_s_bible_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/4591/9652/files/mezajalinaxusiwabadiruxum.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/femaxitidolixedalijikid.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_off0000aef8.bin
876ea3a8931f81472cec599fc80fc1b285e6cf5f51efe1b31ee3500a813b24b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF8 5736 bytes
font_01_sfnt_off0000c270.bin
365d559212a3568186c2ab17a0674a16fe2f60f9414353fdd50bd394b378b1c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC270 10312 bytes

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