Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7fd6901cd72af98…

MALICIOUS

PDF

47.7 KB Created: 2020-08-23 11:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcb83f5ea578f63a0b4d3fdb93b98dfe SHA-1: 601a2af8cd363ee089bb83d81dd9cd13b2fb74c4 SHA-256: f7fd6901cd72af98ddff5cd95881a5aeda12074c522fd84b8f06d99de73dd304
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. Additionally, it exhibits a PDF link farm behavior, embedding numerous external PDF links, many hosted on Shopify. The document body, though partially obfuscated, contains text related to movie ringtones and photography poses, suggesting a lure to entice users to click the embedded links. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=anukokunda+oka+roju+movie+ringtones'.

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=anukokunda+oka+roju+movie+ringtones
    • http://tometu.fcstnebraska.com/uploads/1/3/1/1/131164250/904894.pdf
    • http://files.authoravadanielle.com/uploads/1/3/1/6/131607163/6246fc93.pdf
    • http://jivavukij.orchardheightsonthefox.com/uploads/1/3/1/3/131380005/1d820.pdf
    • http://niraxeto.sleepmattersperth.com/uploads/1/3/0/7/130776445/wolavebakajago.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/6193866554.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/77268803517.pdf
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/firasomalavilexujibuniwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/couple_photography_poses.pdf
    • https://cdn.shopify.com/s/files/1/0437/8732/1505/files/kitexerigufumizojip.pdf
    • https://cdn.shopify.com/s/files/1/0429/4528/2214/files/bluestacks_developer_options_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/2223/8375/files/14021501826.pdf
    • https://cdn.shopify.com/s/files/1/0436/9632/4758/files/34756259283.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/kikexurivufuxoxadefaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/lipid_screening_guidelines_frequency.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/53859504192.pdf
    • https://cdn.shopify.com/s/files/1/0464/9415/4904/files/nevopozigi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1402/files/86620054557.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005801.bin
0bf1d64f2c45e7b939a86ffde703de31764dc640dddcae792db05b3e79a72013		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5801 5184 bytes
font_01_sfnt_off0000699b.bin
0608d1fe8a8559a7610ce12d4ca7c03eaca896586e3349bbbab5b45dccefc597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699B 3364 bytes
font_02_sfnt_off0000775e.bin
9d0dde3504feb49240d8d05c0087a7b3aa8fe059c3b89bff5d4ddcb114db1f9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775E 14172 bytes
font_03_sfnt_off0000a373.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA373 4324 bytes

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