Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad64a500b16ed72…

MALICIOUS

PDF

41.8 KB Created: 2020-09-01 01:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2105da5d5348b21389514527475d344 SHA-1: 0aa93ecba9fe86b36415898156ead22967dc12e1 SHA-256: 3ad64a500b16ed727a1ea4aeb7126870611254b2f6dfd7fcc4f185731269c0d1
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, including a critical redirector link to ttraff.com. This suggests an attempt to lure users to malicious infrastructure. 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/wix?keyword=imperative+form+so+lingua+inglesa
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/89100439963.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/whirlpool_oven_accubake_system_self_cleaning_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1469/files/lorategefenonufifo.pdf
    • https://cdn.shopify.com/s/files/1/0463/9857/0651/files/skf_bearing_catalogue_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/pizirijelafuku.pdf
    • https://cdn.shopify.com/s/files/1/0429/7703/4399/files/57683335562.pdf
    • https://cdn.shopify.com/s/files/1/0463/3070/8125/files/zaguselenusowip.pdf
    • https://static.usrfiles.com/ugd/bb13a2_76ef9a331717463b8ae153d8cb37bbaa.pdf
    • https://static.usrfiles.com/ugd/b8c837_440114f5513f4854b313b69758118795.pdf
    • https://static.usrfiles.com/ugd/de3d83_d02cf056b31e4c84b97ab2d985ff181a.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/soxasife.pdf
    • https://cdn.shopify.com/s/files/1/0433/0831/8878/files/76315924050.pdf
    • https://cdn.shopify.com/s/files/1/0429/6710/5687/files/soxafe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2455/files/metro_pcs_phone_payment.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_off00005c9f.bin
c09aae1be741513b328443cde61dbfdbda99cf4f26ba792d789a93b98e17e409
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9F 5216 bytes
font_01_sfnt_off00006e51.bin
82929aa7197feb82a027c93b515682171366059837dcaab5016afe9902b38c96
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E51 14160 bytes