Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe0009e7b59ee04…

MALICIOUS

PDF

43.2 KB Created: 2020-08-20 00:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e54b09a89b7ee21833856c408959e1d3 SHA-1: 29cb04fc5952b57dda009edb4e4e025f66a824ee SHA-256: 3fe0009e7b59ee0447537636cc532141d69d177944ff48a40db5d462ddb1e6b5
154 Risk Score

Malware Insights

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

The PDF contains a deceptive title and a large number of embedded links, many of which point to external resources. One of the primary links, 'https://ttraff.cc/pify?keyword=bedingte+formatierung+excel+2010+datum+%25C3%25BCberschritten', is identified as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous links to PDF files hosted on various domains, including Shopify. 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=bedingte+formatierung+excel+2010+datum+%25C3%25BCberschritten
    • http://files.juneoils.com/uploads/1/3/2/6/132681647/junezedelusezu-xolikusiku.pdf
    • http://files.drheatherloenser.com/uploads/1/3/0/9/130969334/deabd0921c416a.pdf
    • http://files.spicesrus.shop/uploads/1/3/2/6/132681210/5e6eca6c554.pdf
    • http://files.danpetersundland.com/uploads/1/3/1/4/131482823/8854622.pdf
    • https://cdn.shopify.com/s/files/1/0440/2439/7989/files/nexaparufazogatupezapudes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/89625013396.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/34769504860.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/senadagaguxidaberiwobuzez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/14997121635.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5559/files/73752872910.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/minecraft_morph_mod_1._8.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/jetoxidolanikakorixilume.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/puxatazageb.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_off0000616d.bin
acda9604f45bff3ba8282bf31971ea0205d7df9b7c930bce9fa6ff83556d1e01
pdf-font-stream PDF embedded font (sfnt) at offset 0x616D 6140 bytes
font_01_sfnt_off000075eb.bin
3663dc5cf5c4fa65772301840a9237ead21862bea0f7fa951ae9cf4dd2bd17c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x75EB 11912 bytes