Malicious PDF — malware analysis report

Static analysis result for SHA-256 51183c648b2d1aa1…

MALICIOUS

PDF

42.6 KB Created: 2020-08-07 14:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0148b35c2b3904219f0a9f57d0b27fd7 SHA-1: ec987497120ccd56b97d95bc6d439dfe5822edc1 SHA-256: 51183c648b2d1aa188e844d89f99f1806cb24f41eecab63b4563cccac34b615b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link that points to ttraff.com, a known malicious domain. It also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting a social engineering lure to download further content or navigate to a malicious site.

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=simple+english+translation+book+pdf
    • http://files.yergens.net/uploads/1/3/1/6/131637178/1890600.pdf
    • http://files.mealsonwheelssb.org/uploads/1/3/0/9/130969498/a839d36.pdf
    • http://zizatuv.hubbellbros.com/uploads/1/3/0/7/130738837/jikifexugulerur_jupiminabudu_papisok_jikit.pdf
    • http://mixoki.yogadharmadowntown.com/uploads/1/3/0/8/130874276/jupujejopino.pdf
    • https://cdn.shopify.com/s/files/1/0437/7057/7058/files/91849814246.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/watch_spartacus_on_line.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/xelidiluxigaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/pdf_to_word_download_crack.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/sabawer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/bigibimogaweseviwuwip.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2624/files/shadowrun_4th.pdf
    • https://cdn.shopify.com/s/files/1/0429/3571/3958/files/11361455569.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/representantes_del_materialismo_historico.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/machine_learning_by_andrew_ng.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/89033407878.pdf
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/mukesimir.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/principle_and_application_of_chromatography.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/type_a_type_b_personality_test.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_off00006765.bin
08aecb7cfffc9f01bc18804f32778684bc635261a0adecde3d60daf39084b9f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6765 5764 bytes
font_01_sfnt_off00007ad2.bin
64a466a5bab1c3c8ab1b8efbe71ac46362d612ad2ca08ecc1f2ea0839867809f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD2 10072 bytes