Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f402256ee8990b…

MALICIOUS

PDF

37.7 KB Created: 2020-08-21 02:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3779ce4306b2bf51b9723ac240a1573 SHA-1: a3f3efa432d8161031be7c16e782b3e5bec5b536 SHA-256: 27f402256ee8990b82e7226621ca845919d9be960c70da93004dabbf60d882ce
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary malicious redirector identified as https://ttraff.ru/pify?keyword=2012+chevy+impala+haynes+manual. The heuristic firings indicate this is a link farm designed to manipulate search engine results or redirect users to malicious content. No scripts were extracted from this sample, and the document body is heavily obfuscated, but the presence of the malicious redirector and the link farm structure strongly suggest a malicious intent, likely for traffic redirection or further exploitation.

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=2012+chevy+impala+haynes+manual
    • http://files.poromechanics.org/uploads/1/3/0/7/130776592/f2988c6eb.pdf
    • http://files.onewesterra.com/uploads/1/3/1/4/131453109/kagilunukiki_xujexipino.pdf
    • http://files.lunkerhunters.org/uploads/1/3/0/7/130739043/duzanedowega.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6679/files/sadutunafofumubavuguwuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/xefewuwajipiwigunofosu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1793/5770/files/86157582177.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/dotod.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/41313792660.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2432/files/60408310552.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/98263088560.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8988/files/plan_1er_arrondissement_paris.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/15330633174.pdf
    • https://cdn.shopify.com/s/files/1/0440/9019/6133/files/oxford_bible_commentary.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/65872027832.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_off0000536f.bin
9a9333c6166fef09cea463c081fab3f127c7c39fab9f60d8fcee5e1c927341de
pdf-font-stream PDF embedded font (sfnt) at offset 0x536F 5468 bytes
font_01_sfnt_off000065f8.bin
bc79232422ba58a6ac0b601c454943928b4c044c1a29cf9f75e1960bb2bfbbe4
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F8 10916 bytes