Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e46cb4e0b5c0781…

MALICIOUS

PDF

43.3 KB Created: 2020-07-29 13:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f6d716a1958e844cd4538efba88913 SHA-1: 6ada12f82965ad40adc82ee2ee2b4648c547b698 SHA-256: 0e46cb4e0b5c07813b934d01623f15a73bf106751080d177e023921251906479
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to SEO-farmed content or known malicious redirectors. The ML classifier strongly indicated maliciousness. The primary malicious IOC is the ttraff.cc redirector, which is likely used to funnel victims to further malicious sites.

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=mnps+calendar+2020+20+pdf
    • http://files.shopharperfinch.com/uploads/1/3/1/6/131636843/kejimojavu.pdf
    • http://files.lifton.ca/uploads/1/3/1/8/131857152/diler_xavokebiresafoj.pdf
    • http://files.residenzanavona.net/uploads/1/3/1/4/131483371/4cf040.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/gasipivonekirunewifu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/jenuli.pdf
    • https://cdn.shopify.com/s/files/1/0436/0136/3107/files/vanelobalofu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6810/2558/files/7243702295.pdf
    • http://files.tpak.people.ua.edu/uploads/1/3/1/0/131070934/8709670.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9238/files/niziwug.pdf
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/nuwusedis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/vurifomobo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/44997809711.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/33394679611.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/kipamigobuwakowazivujab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/mokipenaluguduliwugawir.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_off00006d4b.bin
a887a90f338530e06f68292831ae89af7049558d4e17af572326d09c3f91ebb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4B 4976 bytes
font_01_sfnt_off00007e35.bin
10d695f807b64c36054ca114b3c7694bf92fae2e6db8edf1221843f67bd490a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E35 9816 bytes