Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7922ee685541cc…

MALICIOUS

PDF

41.9 KB Created: 2020-08-23 01:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31b5fff891090825f2f0bdff423b182c SHA-1: 78cec228a8a2e575439ac01f06779d01d1acfb51 SHA-256: 9d7922ee685541ccce60791b1059e27b08c326f445d1379fdce3292f75b7aac6
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, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=automatic+guided+vehicle+meaning
    • http://wukeju.womenofpurposeglobal.com/uploads/1/3/1/4/131406893/marenamuniki.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/32074071185.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/biludetejuvujatolometa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/mekavixoninomedagavigafod.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9397/files/linivugex.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/56662024749.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/xadezumoxutenidodevelaves.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/sazamirekefujobobifum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/matubezanalibavoso.pdf
    • https://cdn.shopify.com/s/files/1/0437/7654/0834/files/analisis_data_penelitian_kualitatif_burhan_bungin.pdf
    • https://cdn.shopify.com/s/files/1/0435/6872/6171/files/aws_solutions_architect_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/lowes_moses_lake.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/puvozaku.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_off000067e9.bin
e3c81ff9661f4ae659031958e06b3804d57bd639df1fa54147c7f63eb9fe6969
pdf-font-stream PDF embedded font (sfnt) at offset 0x67E9 5128 bytes
font_01_sfnt_off0000793d.bin
948ea27018ca256d55763fa37d47719c905410567718544af01914cb48be1f04
pdf-font-stream PDF embedded font (sfnt) at offset 0x793D 9824 bytes