Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1525e6523c91c00…

MALICIOUS

PDF

58.7 KB Created: 2020-08-08 18:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f826099ef8509141a2029d27353d74b SHA-1: e0c4958fb3b4728450e9dcbaa7edecaf72ef8c14 SHA-256: f1525e6523c91c00863cbdc1d27a14ac50fa704cdf149d7b9e8656d44e240dbe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, contains the same redirector URL and appears to be an attempt to lure users into clicking on these links by promising a free download. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=business+driven+information+system+pdf+free+download
    • http://files.marco-mazzini.com/uploads/1/3/1/4/131437229/a6421d94c.pdf
    • http://files.whereisjackie.com/uploads/1/3/1/4/131408415/milujanu-xorizumude-nagejaxepegex-xoporewa.pdf
    • http://files.missspic.com/uploads/1/3/0/8/130873717/699ffeea254c.pdf
    • http://files.bodymindacupuncture.co.uk/uploads/1/3/0/9/130969192/1b8d517aa39.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/mamorumevobafove.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/76821568557.pdf
    • https://cdn.shopify.com/s/files/1/0446/6409/4873/files/how_to_cartoon_a_picture_in_photoshop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6967/7474/files/86189740929.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/jixalexomatetanojofafuda.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/junimomekudefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2819/files/19707779345.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/sasivupivimotufobuxevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2457/files/fepuvofilizugirowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6465/files/mewekinadulezuramurab.pdf
    • https://cdn.shopify.com/s/files/1/0430/8313/7178/files/kenikinofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/atrial_septal_defect_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/81495679956.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_off00008f02.bin
d2193c5310a0703e97f977be3e2658e7b5d84b7c568fe6f6bc7259ea98fcbade
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F02 5488 bytes
font_01_sfnt_off0000a1a7.bin
c3722b704a42ee952907b3acf23099ebe8d10fc6714e86194f09e413436e67df
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A7 5696 bytes
font_02_sfnt_off0000afce.bin
ac315890e06a8edd2cf658f48ce050006b2e5420739cf09104cb1aa24fc39222
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCE 14520 bytes