Malicious PDF — malware analysis report

Static analysis result for SHA-256 984309ff21688f25…

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 03:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 238d5abd75168559210cbc6bfd3115ec SHA-1: 30b3351610719ca277861364c97f94da636ced7a SHA-256: 984309ff21688f25ed588dee5deb194a27c1ef96a09e2fd9a92c51463f40abd7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=cinderella+short+story+summary+pdf', is flagged as a malicious redirector. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted from this sample.

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.ru/pify?keyword=cinderella+short+story+summary+pdf
    • http://files.arenalrainforestproperties.com/uploads/1/3/2/6/132695543/tefelizaxoxut.pdf
    • http://files.keithdowniepaintings.com/uploads/1/3/0/7/130738852/fukatosorafetadusiru.pdf
    • http://files.themysticgrounds.com/uploads/1/3/1/0/131070792/f373b2964.pdf
    • http://files.japanesephilately.com/uploads/1/3/1/8/131871651/3756864.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/55190376266.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/fubabisutod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/sistemas_energeticos_aerobico_y_anaerobico.pdf
    • https://cdn.shopify.com/s/files/1/0432/1820/6887/files/98747832690.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7217/files/jaxapajapodomi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/52984108801.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7570/files/quantitative_aptitude_syllabus_for_ibps_po.pdf
    • https://cdn.shopify.com/s/files/1/0436/2128/6050/files/balantidium_coli_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0444/7302/4679/files/low_back_strengthening_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/62710015565.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.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_off000069f9.bin
0097a0551c22fda7fea9c45385d3ea19b57ca42dee75ed7b54fabfccd8acefaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F9 5288 bytes
font_01_sfnt_off00007bc7.bin
9bde8d5d433f1e490bf7098df4233727041e1da23b90d51ac7315dacce0f9a37
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC7 10108 bytes