Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd064b3559f1ff0…

MALICIOUS

PDF

35.7 KB Created: 2020-08-30 09:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e8c89cfb99e846ffb2a1826a9736ead SHA-1: 71c9d5de8dffb10c9d15fee484dadf562941730f SHA-256: cfd064b3559f1ff06d53caa297e5bf5fc5df1c580b3f4f7253d6bc60f14859e8
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 'https://ttraff.cc/wix?keyword=tv+7+tube+tester'. This URL is presented within the document body, suggesting a social engineering lure. The document also contains a large number of embedded links, many pointing to Shopify domains, which is flagged as a PDF link farm. 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.cc/wix?keyword=tv+7+tube+tester
    • https://cdn.shopify.com/s/files/1/0428/7997/5590/files/chevy_s10_5_speed_manual_transmission.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0598/files/colin_mcrae_dirt_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/5674/2046/files/jujugoxomikudub.pdf
    • https://cdn.shopify.com/s/files/1/0436/9098/3574/files/22145655015.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/new_tan_application_form_49b.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/vaxuralivipi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3808/7070/files/video_perang_belanda_vs_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/risidofu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/4591635615.pdf
    • https://static.usrfiles.com/ugd/b8c837_470e11c826a442f0ab865352db2ba501.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba1c95c30cf7409fb381c6f1eafe6daf.pdf
    • https://static.usrfiles.com/ugd/d4da64_9f9ca7f15d3e4932ac7a445026761de0.pdf
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/46874467680.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/nilefufuviwape.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_off0000467a.bin
e73f7ca63bff579a57118d98f160c896335bf80f075dfdd732174ccf798f6a7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x467A 4664 bytes
font_01_sfnt_off0000566e.bin
975bd64c67c6dc3ed576e7235e2ad27505c369151c4d93fd64da01bd40f0d16a
pdf-font-stream PDF embedded font (sfnt) at offset 0x566E 14168 bytes