Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb12f399ad3fdb42…

MALICIOUS

PDF

32.9 KB Created: 2020-08-20 01:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed359d9590f583a254c2c459e7b63181 SHA-1: f9eda339d2d62f17c972032d718bbc1c0e7f853f SHA-256: eb12f399ad3fdb42ca424143907a325d7a58dc04273827af1cd801ebd947ffdb
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that leads to a link farm, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly flagged this PDF as malicious. The embedded link in the document body, 'https://ttraff.cc/pify?keyword=fitch+connect+user+guide', is designed to trick users into downloading potentially harmful content.

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/pify?keyword=fitch+connect+user+guide
    • http://files.opnrc.org/uploads/1/3/0/8/130814169/565fc1413.pdf
    • http://files.johndancerviolins.com/uploads/1/3/1/8/131871991/5580121.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/advanced_mathematical_concepts_resource_masters.pdf
    • https://cdn.shopify.com/s/files/1/0452/5244/4320/files/biology_textbook_college.pdf
    • https://cdn.shopify.com/s/files/1/0433/8542/1978/files/binary_options_winning_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0430/9277/0977/files/7935122706.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/ambarella_cv2.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3439/files/88840987640.pdf
    • https://cdn.shopify.com/s/files/1/0432/9573/5976/files/89166794412.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/bmat_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/86489915156.pdf
    • https://cdn.shopify.com/s/files/1/0428/4402/9084/files/visiguva.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1547/files/zenupukobejuxu.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_off000046f1.bin
6d527d3ba1d1720d2d5a04ba05ae0936d56d1e9f81cb69a1ff17218750d167c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x46F1 4916 bytes
font_01_sfnt_off00005795.bin
1b5f36d74e11075abff945ab824b5f15b094bc5ed06623574ac286c61ee40574
pdf-font-stream PDF embedded font (sfnt) at offset 0x5795 9312 bytes