Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b015217b7cec91…

MALICIOUS

PDF

43.4 KB Created: 2020-08-28 09:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d17a35d0d1e44407120d51dcbe42aa7 SHA-1: b8bb27ae00a84f7a1e6500075fdde43bfc393abe SHA-256: c4b015217b7cec917d23dce8eeb58fe1d5ea2055facccaa126ca3fdc28bf4a62
128 Risk Score

Malware Insights

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

The PDF contains a link to a redirector hosted on 'ttraff.ru', which is flagged as malicious. The document body and heuristic firings indicate a lure related to invoices or payments, aiming to trick the user into clicking the malicious link. The PDF also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or distribution method.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=facturacion+cfdi+gm+modelo+gmodelo
    • http://gepej.yogadiversityinitiative.org/uploads/1/3/1/4/131437261/laroli_pezogijavamu.pdf
    • http://besafa.davidharriscollection.com/uploads/1/3/2/8/132816202/247798d12d5423.pdf
    • http://files.jmn-i.com/uploads/1/3/0/8/130814642/badegumun-vafadivo.pdf
    • https://cdn.shopify.com/s/files/1/0439/5089/9368/files/desaxesex.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/86182611061.pdf
    • https://cdn.shopify.com/s/files/1/0464/7911/4408/files/xusaxademuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/anna_thangi_film_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/traducteur_de_texte_anglais_franais_apk.pdf
    • https://cdn.shopify.com/s/files/1/0447/9772/2785/files/the_cabbage_soup_diet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7234/6526/files/isometric_neck_strengthening_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/92809248444.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/lic_jeevan_saral_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/8440/7199/files/saatleri_ayarlama_enstits_karakterleri.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0734/files/9178062116.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/permutations_probability_word_problems_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d03.bin
30ccbb5e381401bb861ef15e93cc401ae1a4aa9d1ea4893bae99e8a714b2d1e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D03 5000 bytes
font_01_sfnt_off00006de8.bin
353b92dee24195ed74b1adf24b93544ad0261e8e59e41ce9fb5bacb7042e6d8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE8 10576 bytes
font_02_sfnt_off000091c4.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x91C4 4324 bytes