Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b25f7dfc9cbe0c…

MALICIOUS

PDF

41.1 KB Created: 2020-07-23 00:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e27bf393b967b972bd449135585e1a92 SHA-1: e752145976982e5c79d2f4315607cf5444902ad8 SHA-256: 59b25f7dfc9cbe0c2b7008b68573639a4a679db6b9ceebdc7bc2d96064f8663f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which point to Shopify domains. The document body, though heavily obfuscated, suggests a lure related to educational materials. The primary attack vector appears to be social engineering via a seemingly innocuous document, leading to a malicious redirector.

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=bridges+in+mathematics+grade+3+home+connections+answer+key+pdf
    • http://files.returningtomyself.com/uploads/1/3/0/7/130738876/xowezodezuk.pdf
    • http://files.satchelcafe.com/uploads/1/3/2/3/132302858/pukifodarubud_bamujob_fotelarutele.pdf
    • http://files.melissabeaty.com/uploads/1/3/1/4/131409884/dinusiduj_giluk.pdf
    • http://files.familyforeveranimalfoundation.org/uploads/1/3/1/6/131637896/9177987.pdf
    • http://files.metuiteme.com/uploads/1/3/1/4/131453054/poxunumarud_nozobaj_rumoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/49686917664.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/56265005617.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/1129466646.pdf
    • https://samebixera.files.wordpress.com/2020/06/tupomajatenumepaj.pdf
    • https://xifaxule.files.wordpress.com/2020/07/63954234407.pdf
    • https://gomumutuweno.files.wordpress.com/2020/06/73027162207.pdf
    • https://gizefonafo.files.wordpress.com/2020/06/26480977913.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bepojarovizezeba.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/zapesuxejafadojakise.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/lajituduzolowutamum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3799/files/jewumaxidusosu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/bobemu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/numuna.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/sefededegosozawovepav.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/zazebuv.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/
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/11294666

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006287.bin
57748cc63597afd653d3c9b3c44d785f83b7ef5c04df5bc83436f323f46700f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6287 5796 bytes
font_01_sfnt_off00007624.bin
a929929c182d870f67cb33ed96983bbfc7d64726504789d2b1f01cd857656e0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7624 9464 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.