Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c4f24584a5c657…

MALICIOUS

PDF

46.9 KB Created: 2020-08-29 15:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce6e07346277f3e5945cf2f074a1462a SHA-1: 31bf225af2fc1d973201c2d19e405134243bcd25 SHA-256: e8c4f24584a5c657749cad970dbcee68196c1bad1e882381ca6201d283b7cea5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com and ultimately redirect to malicious infrastructure like ttraff.com. This indicates a phishing or malicious redirection attempt, likely designed to lure users to compromised sites or malware distribution points. The ML classifier strongly supports the malicious nature of this PDF.

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=sony+rx+100+m2+review
    • https://cdn.shopify.com/s/files/1/0435/8717/4557/files/44004135992.pdf
    • https://cdn.shopify.com/s/files/1/0432/1538/8840/files/fisevef.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/fomuvanizej.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/manual_core_aerator.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/laxasivazitugofo.pdf
    • https://static.usrfiles.com/ugd/b8c837_4af4ba60d53a4413bc00bf74e439031a.pdf
    • https://static.usrfiles.com/ugd/b8c837_295504e368084fa4823ef55b4eb52df5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec07f4d7eb984ae492582043b5a560e4.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/78846231090.pdf
    • https://cdn.shopify.com/s/files/1/0438/5731/3957/files/whom_should_you_see_at_the_bank_if_you_need_to_borrow_money_algebra.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5e78facce2c48d689999f3f23c0322d.pdf
    • https://static.usrfiles.com/ugd/b8c837_442329143f1244b99b68507da90d1fdc.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5576bb4e82e473a9abac39e90c939a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_779f679d34cc4bf49bc449e7b4a11641.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed2fe5c954c0403892702dc696a2b420.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_off00007ab6.bin
bde520f8551caffb349243b6546ce1831d0b053870fe2c97ff5376732ed5489d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB6 5160 bytes
font_01_sfnt_off00008c51.bin
c07b6dde98164f2e7c2cfaba4eaec600911a330d8ecd8f787faa736a2ebacf0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C51 10196 bytes