Malicious PDF — malware analysis report

Static analysis result for SHA-256 2736884c7aa99e02…

MALICIOUS

PDF

47.4 KB Created: 2020-08-19 05:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 222c87b370415595bf30a5187bd310c4 SHA-1: 1c51016ba8d7e388f140fe997b6d9472ea0d0d95 SHA-256: 2736884c7aa99e02e0af32613e2387fe5791e2af969d1687c08c2953f874fee1
154 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for containing a malicious redirector link to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains hosting PDF files. The ML classifier also strongly indicated maliciousness. The presence of a malicious redirector suggests an attempt to direct users to a harmful destination, likely for phishing or malware distribution.

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=android+animatorset+loop
    • http://files.wcmasterspolo.com/uploads/1/3/2/6/132681619/fcf4b0d4f8fc.pdf
    • http://divirilaw.thegorsebush.com/uploads/1/3/1/4/131410685/b1276.pdf
    • http://wakajuvil.craiglewismurals.com/uploads/1/3/1/3/131380213/lukufofabuloj-deguredewas-wisomipevuxej.pdf
    • http://files.pnwvixens.com/uploads/1/3/1/6/131637701/vifufowikosil.pdf
    • http://files.goepfertspeechassociates.com/uploads/1/3/1/0/131070452/3593886.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/46037147996.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2967/files/zoligelowopokowasukowum.pdf
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/xibiruvufatudip.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/videpibejaruwuxane.pdf
    • https://cdn.shopify.com/s/files/1/0432/4337/2699/files/pidalemetolo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/wivemegufewelofe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3618/0634/files/exercicios_de_biologia_botanica.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/gezovonigukegojipimisiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/kotunakaxitebaxemajube.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/8228511632.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_off00007786.bin
5e298b3f4237e0f19f1eaf5f4214945a0d3dde2573b971160f6055eda4484763
pdf-font-stream PDF embedded font (sfnt) at offset 0x7786 5092 bytes
font_01_sfnt_off000088b5.bin
3e29c65131e186ccc3377af2f6d63f1fc0185ce5374852a43dab7cfd558ece85
pdf-font-stream PDF embedded font (sfnt) at offset 0x88B5 12592 bytes