Malicious PDF — malware analysis report

Static analysis result for SHA-256 158ea42b0fdbcf37…

MALICIOUS

PDF

41.4 KB Created: 2020-08-10 21:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4956fbb11aba7712042fc7a251d122e SHA-1: 8a607af82694c7c6a4cbdc90993d30063f96c405 SHA-256: 158ea42b0fdbcf3730aa23d71d7027239d8f6cffacc44d64660fbfa0db247475
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a redirector URL. The document body, though heavily obfuscated, contains references to the redirector URL and other benign-looking PDF files hosted on Shopify. The primary malicious intent appears to be directing users to malicious infrastructure via the "ttraff.cc" redirector.

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=story+elements+chart+pdf
    • http://files.falconssoftball.com/uploads/1/3/1/4/131438268/wenolino_repuxobet.pdf
    • http://files.kerrymaymakes.com/uploads/1/3/1/4/131411474/75f5d5152b272b.pdf
    • http://files.hallpt.com/uploads/1/3/2/6/132695569/manufasuzegumabana.pdf
    • http://dabaze.cathybaylorpiano.com/uploads/1/3/0/7/130776031/c04393ef16336.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/7072133649.pdf
    • https://cdn.shopify.com/s/files/1/0437/3538/4225/files/42699819287.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/varied_commodities_recipe_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/volivuliwuwuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/3836/6113/files/kewujafujone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/nonumovonuvosepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/puzalodiweraginapavanan.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/wuzujifafasubadekef.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/vonukabikipi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/9965208854.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/80128530129.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f4.bin
c2a145ae448dcdc857363181ead43505fdc4d15236844b0193aad596b7487927
pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 5600 bytes
font_01_sfnt_off000076cf.bin
1d0909421784d1d3f6bbe0179cbc2ab8185f62901160f4f1d6af4aec330dea74
pdf-font-stream PDF embedded font (sfnt) at offset 0x76CF 9948 bytes