Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad11565df6c0bfe8…

MALICIOUS

PDF

33.6 KB Created: 2020-08-23 01:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a48efc713a6c3a6393d04cc86c4952a8 SHA-1: a8d870a6d7abeb71d9abab8533724b1653577614 SHA-256: ad11565df6c0bfe8821209955ee72b4225739ff1fec0bef55a313d7e99e1887a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links directs to a malicious redirector at ttraff.com, which is likely used to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=cheetah+wallpaper+full+hd
    • http://files.paperpensandplanners.com/uploads/1/3/1/8/131871859/lofikazenepoku.pdf
    • http://files.jeffreyscottsalsbury.com/uploads/1/3/1/3/131380094/8cbdb3684.pdf
    • http://files.lifestylefitness.club/uploads/1/3/1/4/131407135/kufelododigadif.pdf
    • http://files.aldersongallery.com/uploads/1/3/2/6/132681970/wewaruxop_dadimoti_rufugirodoju_jexodejilojam.pdf
    • http://files.kocanada-usa.com/uploads/1/3/1/4/131437538/zorodoke.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/pofaje.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9365/files/two_way_repeated_measures_anova_reporting_results.pdf
    • https://cdn.shopify.com/s/files/1/0461/7057/0915/files/vector_triple_product_solved_examples.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/kenenumeronogatexife.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/chemistry_textbook_for_secondary_school.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0025/files/21534814886.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/zigepowefeb.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/2946266932.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/wpf_treeview_hierarchicaldatatemplate_selected_item_mvvm.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/74799617858.pdf
    • https://cdn.shopify.com/s/files/1/0441/0313/9480/files/diabetes_guidelines_2018_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/isometric_grid_download.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_off000048a9.bin
34e68098af955c8c95564a1656fa00495c093d1a860787b92815fc9b598c1f6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x48A9 4948 bytes
font_01_sfnt_off00005987.bin
f81583d8774f36f33d4f34b4c8d24e88e15dacb8d30741eb58a406c11b96bdd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5987 9440 bytes