Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ffefefd9d74e3f…

MALICIOUS

PDF

50.1 KB Created: 2020-07-29 18:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce15404fe7f3eda77dad194665a48e60 SHA-1: a0e9a3b91dde045c455cab772c1164ab9cd03857 SHA-256: a1ffefefd9d74e3fba1ee27a9b9d75429326424803e9e6961846d47d5fb2dcc1
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with a critical heuristic identifying it as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=autoit+manual+pdf', points to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be malformed or truncated, providing no direct user-facing content to analyze.

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=autoit+manual+pdf
    • http://files.anchorfloral.com/uploads/1/3/0/7/130776828/makujevuje_fidamilukewaru.pdf
    • http://files.julieanneason.com/uploads/1/3/0/8/130874588/6e745b.pdf
    • http://files.alishaniaphotography.com/uploads/1/3/2/3/132302924/fulapidi-xegogijil-xenedi.pdf
    • http://files.juli
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/wupirawezejijijaronekelo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3962/9218/files/fedirokige.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/lunirasifemiruporesirin.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5320/files/37940091712.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/mosadovipemudaguvenu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8679/0304/files/rinagedukuzoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/boguxexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3195/2536/files/4050306888.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/97483291206.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/lezoxamurisozatetitatoroj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4925/5061/files/77457681464.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_off000085cd.bin
57de7c4dd5e9e44b88e00922c2aa30dcb97dbad06b5be224092f3d74fb07be94
pdf-font-stream PDF embedded font (sfnt) at offset 0x85CD 4668 bytes
font_01_sfnt_off0000958e.bin
5f51cd2aab4128f9bdc6ea341f367052fc3d2ea21909de331bf9e0d579cd0472
pdf-font-stream PDF embedded font (sfnt) at offset 0x958E 10676 bytes