Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce279e5cf08dd484…

MALICIOUS

PDF

43.6 KB Created: 2020-08-18 17:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17cf7cdf2410ee4d0b8d2c220b5cf0b3 SHA-1: 069f87bdbb9afc0b809f7995331680056cf22fbe SHA-256: ce279e5cf08dd4841cfa5ebbc839394108dc042a3ab4213ef843afaaedce3699
152 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of external links, a common tactic for SEO poisoning and redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to `ttraff.com`, a known redirector. The PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, many hosted on `cdn.shopify.com`, likely intended to manipulate search engine results and lure unsuspecting users. No scripts were extracted from this sample.

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=farm+animal+counting+worksheet+preschool
    • http://files.viableoptionsphotography.com/uploads/1/3/1/4/131437246/9535907.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/ethnocentrism_definition.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/crusader_invoker_build_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/6873/3078/files/votezilemuwusuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/birakadesov.pdf
    • https://cdn.shopify.com/s/files/1/0432/1230/8637/files/android_activity_lifecycle_example_code.pdf
    • https://cdn.shopify.com/s/files/1/0440/5464/2853/files/23547163606.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3831/files/54450171656.pdf
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/angular_5_date_format_locale.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9803/files/ccna_security_lab_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/application_of_nanotechnology_in_medicine.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/dolmen_mall_tariq_road_store_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f57.bin
5d53fececf636b60029e40776ed41ada69c2eb18e542a6aec185dc87ae087a06
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F57 5340 bytes
font_01_sfnt_off00007160.bin
d6bb481a159cb1d3b0af5077107cdb0be0c7ae89c6cd283c60dc008aea272b1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7160 9992 bytes
font_02_sfnt_off0000937e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x937E 4324 bytes