Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c42de524ee7ed0…

MALICIOUS

PDF

40.2 KB Created: 2020-07-09 07:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1911a2027f558f10e5a9a9708eb174dd SHA-1: 385edb85d3354898e1cbb12dd66f8c8760baaf93 SHA-256: a2c42de524ee7ed0812a60e33e311bdfdb79c29fbd0917efa737849eca53a995
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, including one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains text related to 'mac preview delete page pdf' and numerous URLs, suggesting a lure to trick users into clicking malicious links, potentially for SEO poisoning or to download further malware.

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/wb?keyword=mac%20preview%20delete%20page%20pdf
    • http://files.snowypeaksoap.com/uploads/1/3/2/3/132302973/a7512c13cdce8e.pdf
    • http://files.dreamwayborzoi.com/uploads/1/3/1/8/131856877/1252709.pdf
    • http://files.inthyme-dod.com/uploads/1/3/1/8/131857818/fotixurarid-rosetalafemivo-lorara.pdf
    • http://files.caaeonline.org/uploads/1/3/1/3/131379252/tufovovofivozibab.pdf
    • http://files.thomas-flores.com/uploads/1/3/1/1/131163910/sofobinorodenezafas.pdf
    • http://files.fondrentheatreworkshop.org/uploads/1/3/0/9/130969603/0cd6380c3.pdf
    • http://files.nxtgenerationenergy.com/uploads/1/3/2/7/132740415/sodegebu.pdf
    • http://files.theskinthatburns.com/uploads/1/3/1/1/131164534/f66e7e2f6bf.pdf
    • http://files.naramatachildcare.com/uploads/1/3/1/4/131405940/459dc24a50.pdf
    • https://vijudokamaji.files.wordpress.com/2020/06/nulilododiperudojep.pdf
    • https://xevadev.files.wordpress.com/2020/06/69801950616.pdf
    • https://vigazot.files.wordpress.com/2020/06/63169034209.pdf
    • https://lawivomeru.files.wordpress.com/2020/06/65154226303.pdf
    • https://kusapufafa.files.wordpress.com/2020/06/14175252950.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.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_off000060be.bin
6e127def5350456af307cb12e977f5a6527082debc4851c130a1bd91183d2587
pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 4876 bytes
font_01_sfnt_off0000717e.bin
980772b1a1efaa760bc260987dd12de19396909161b56a82c5be534854d94056
pdf-font-stream PDF embedded font (sfnt) at offset 0x717E 10028 bytes