Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc4c029e1b682c0…

MALICIOUS

PDF

34.5 KB Created: 2020-08-25 20:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e904daf02b5038ebe6a9cc6100fd814 SHA-1: e11d1b43156207bfb76db68223fc1747a898643f SHA-256: 6bc4c029e1b682c0aa504e401f6ab60e29a55be82e0b683ebe58be0f9d4ce5f0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though obfuscated, contains references to a TV show episode and the tool used to generate the PDF, suggesting a lure. The primary purpose appears to be directing users to potentially malicious or spam content via the link farm.

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.ru/pify?keyword=moon+lover+ep+16
    • http://files.anniepercussion.com/uploads/1/3/2/7/132740321/disatibe.pdf
    • http://fopom.bridgeportcf.org/uploads/1/3/1/8/131871787/1802088.pdf
    • http://sapomokuw.church-in-the-park.com/uploads/1/3/0/7/130739654/waburewupemigux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/william_lee_rand.pdf
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/72166059473.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/jidus.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/garizolevoveluza.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/brain_teaser_worksheet_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/vujadupozovasamonituzukuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0818/files/95110382970.pdf
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/guided_science_readers_level_a.pdf
    • https://cdn.shopify.com/s/files/1/0432/5143/3627/files/xajulon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003ed5.bin
82b14559c40fbacbfdbbd0e6e24e1935119f6fa2ff2eeee76989a0ef94ba1d0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x3ED5 4080 bytes
font_01_sfnt_off00004d54.bin
3e2c84e1b64927a4340453b3b8b26716f608a1e93a8878bab962b22266233d20
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D54 4696 bytes
font_02_sfnt_off00005d75.bin
4cc8ec7af1ff9ea8435a952ed096984c07366d805da7689e11339d8346e315c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D75 8904 bytes