Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9270d684616b4c5…

MALICIOUS

PDF

47.0 KB Created: 2020-08-01 23:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15e7ef3c4a3258d10743ad764ab03ec5 SHA-1: 560b3c271ac4e9441f5bebca698037df7dd3ea43 SHA-256: c9270d684616b4c53ce7c99179fb6ed5c53cb79b1b43feb9ba54d73047bc979d
152 Risk Score

Malware Insights

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

The PDF contains a link disguised as an 'application initialization error' to trick users into clicking it. This link redirects to a malicious URL, indicating a phishing or redirection attempt. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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=application+initialization+error+adobe
    • http://files.anchoredsoulfit.com/uploads/1/3/2/7/132710563/56b1cc7efec6e60.pdf
    • http://files.learnguitar4fun.com/uploads/1/3/1/8/131856381/8522082.pdf
    • http://files.globalezorder.com/uploads/1/3/0/7/130740458/tufuvo.pdf
    • http://files.frontierprojects.org/uploads/1/3/1/4/131408280/ce337a69f8698e.pdf
    • http://files.racialreconciliation.net/uploads/1/3/1/3/131380511/fixefojivitatiwosir.pdf
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/mupabarapivuxikemikoto.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2805/files/zefogumezogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92283418618.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9616/files/sifuponunadizesopi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/43513514400.pdf
    • https://cdn.shopify.com/s/files/1/0440/5251/2918/files/77856534756.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/85498917952.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6900/files/zudilifebejewadanekawuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xumilegimazuguvabunozanik.pdf
    • https://cdn.shopify.com/s/files/1/0429/6369/7817/files/17600579499.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9593/files/fepexesalogatebabijagite.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/sugutisaloxolavesag.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/gadupitep.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/lupamituxawabotiwogejuje.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/lasso_in_r.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_off00006b01.bin
6a91bc1b2c4ef26274252ff1a9051865199579b50e95bf9bbf8ab7539f79ae81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B01 4856 bytes
font_01_sfnt_off00007b7d.bin
02776b1f7d2832ef737ca86a1187b557dc83b9ad2b90def3655f6f36e149d58e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7D 10872 bytes
font_02_sfnt_off0000a07c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA07C 4324 bytes

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