Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc41cedcaee97fd5…

MALICIOUS

PDF

53.7 KB Created: 2020-08-12 00:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95af59e8d01e0016b004b43ac9a7916b SHA-1: 7a66443ac153dd3e4e3c1d0300be98098036e3cf SHA-256: fc41cedcaee97fd5b041c9c0261c34730004b052ec4ef457a0164ef44ea56275
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=sorting+algorithms+python+pdf', indicating a lure to a malicious site. The presence of numerous PDF links suggests an attempt to manipulate search engine results or distribute content through a link farm, ultimately leading to the malicious redirector.

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=sorting+algorithms+python+pdf
    • http://files.lifechurchaz.net/uploads/1/3/0/7/130740175/zefibifiz-refufovug-rijol-masegi.pdf
    • http://files.libertycraftbrewing.com/uploads/1/3/1/1/131164210/witorumotoso.pdf
    • http://files.leannewaterhouse.com/uploads/1/3/0/7/130776861/1549719.pdf
    • http://files.sacredkinship.com/uploads/1/3/2/3/132303229/31df873b2c2c1.pdf
    • https://cdn.shopify.com/s/files/1/0438/3028/0352/files/lajaberikuvubonewakiwali.pdf
    • https://cdn.shopify.com/s/files/1/0438/4191/2997/files/bidawojobizi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/12501074494.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/pyp_science_scope_and_sequence.pdf
    • https://cdn.shopify.com/s/files/1/0437/1283/9834/files/wapus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.pdf
    • https://cdn.shopify.com/s/files/1/0433/7165/9414/files/sotokedigefere.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/kugez.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/annex_3_icao.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/tawopib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0428/7394/6275/files/raninuxufogegozuxarobev.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/human_anatomy_and_physiology_1_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/sale_of_business_agreement.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_off000087d0.bin
e0101b6595b874447f41aec2de01e16ec14c4c5895ca6cb12474e44c7b951a69
pdf-font-stream PDF embedded font (sfnt) at offset 0x87D0 5660 bytes
font_01_sfnt_off00009ae4.bin
f04b64e28833fe0d96c01803e4eaae6d8a4eb8a61aea36679d479a7b42e54d49
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE4 14964 bytes