Malicious PDF — malware analysis report

Static analysis result for SHA-256 91af2b296f43df34…

MALICIOUS

PDF

44.0 KB Created: 2020-08-01 18:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f486892cab9936ed62cf5d57a669366d SHA-1: 2c2f760491886395b54731996f52c3b99ea2015d SHA-256: 91af2b296f43df34225283676bcc0d60d6b6a0fe720b6c50d80e98c30647283d
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are part of a link farm designed to appear as movie download links. The primary redirector URL, https://ttraff.cc/pify?keyword=hd+avi+movies+hollywood+in+hindi+2015, is flagged as malicious. The document body, though heavily obfuscated, contains references to movie titles and the malicious URL, reinforcing the lure. The ML classifier strongly indicated maliciousness.

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=hd+avi+movies+hollywood+in+hindi+2015
    • http://files.familyfellowshipla.com/uploads/1/3/1/4/131453990/tutinuxo.pdf
    • http://files.bigislandbeekeepers.com/uploads/1/3/1/4/131482931/jodujugab-totejibodetifik.pdf
    • http://files.mshamsi.com/uploads/1/3/1/4/131411245/d40466d.pdf
    • http://files.wavebeheard.com/uploads/1/3/0/7/130740573/zipodajizufu-wegevanini-jevixewagom-jurazoro.pdf
    • https://cdn.shopify.com/s/files/1/0434/2539/8945/files/72666809563.pdf
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/64831901739.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/45549546535.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/49828167677.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/sasagokotebim.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/71634299151.pdf
    • https://cdn.shopify.com/s/files/1/0432/6146/0644/files/61816767987.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/galivaxajufugunudimur.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6279/files/luwekemalibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2960/files/loxudoxasuludupoxulovari.pdf
    • https://cdn.shopify.com/s/files/1/0436/5362/8062/files/99074086859.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_off00006c4a.bin
d3c65ed1492a35535892385ee5d98dd7a0cc9fdda111909ed947eccc67ccb21b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4A 5632 bytes
font_01_sfnt_off00007f77.bin
ade94bd0ce15c11df3aab51265e07bcf3695958b3a35734d56c2debeccac6169
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F77 10328 bytes