Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05f57b950d62756…

MALICIOUS

PDF

39.4 KB Created: 2020-08-18 13:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2a86c0fb4d79f8903a9ba756a23b640 SHA-1: 70494244904f82a86ff30e3280f1ff4b102ec415 SHA-256: e05f57b950d62756b1b8aead30dcc47390306e6f85012d8530ad784c8759023a
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to Shopify domains, but one critical link leads to a known malicious redirector at 'ttraff.cc'. The document body text, though partially corrupted, includes the phrase 'formal wear boutiques near me' alongside the malicious redirector URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link confirms a malicious intent to direct users to 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=formal+wear+boutiques+near+me
    • http://files.elgabilanschool.org/uploads/1/3/1/4/131438313/zarazubowenufipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3040/4506/files/44581685090.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/rebujufez.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/boponerodewezefakagexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikas.pdf
    • https://cdn.shopify.com/s/files/1/0428/2541/6860/files/fundamentals_of_anaesthesia_4th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/6865/1680/files/verizon_fios_internet_outage_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/6835/8807/files/87092666696.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/50156270483.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/rusozuxibekiganowitosipof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0450/9853/files/jatejur.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/90275174118.pdf
    • https://cdn.shopify.com/s/files/1/0431/1053/1233/files/xevivol.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_off00005e23.bin
f699c7b944e287db44b275bb3b9a2037d3dddc2da2a67f6a3a4f7b45d6fa9cb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E23 5144 bytes
font_01_sfnt_off00006f9e.bin
392993e0dc4b8d11e0998041b6580d09710e9bbf23e393b7fe134266b3b8db92
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9E 9796 bytes