Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff668c461558fbb…

MALICIOUS

PDF

59.8 KB Created: 2020-08-07 06:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32ef788f36caee7fd414a35ff35e58b1 SHA-1: 7056f13d406a0b35091023407fdd443efa9d6181 SHA-256: aff668c461558fbbb61da28cb25207731d4241a3f6b53581e3599f2dc465ec9d
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, 'https://ttraff.ru/pify?keyword=d468+transistor+pdf', is identified as a known malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or credential harvesting. No scripts were extracted, and the document body was heavily obfuscated.

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=d468+transistor+pdf
    • http://files.hannahwilliamsdesign.com/uploads/1/3/2/7/132741433/lokajulafos.pdf
    • http://files.yashkona.com/uploads/1/3/2/3/132303378/e493e.pdf
    • http://files.victimwitness.org/uploads/1/3/0/7/130776366/bikisubiguk-fisunudovo-jogidinidunowa-bozef.pdf
    • http://files.limehousefestival.com/uploads/1/3/0/9/130969824/gabawodelirutuvav.pdf
    • http://files.windersonscreations.com/uploads/1/3/1/3/131380345/fcceec133caddd.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/tojupidizeboboxorivir.pdf
    • https://cdn.shopify.com/s/files/1/0438/9198/2491/files/xirafuwisusitene.pdf
    • https://cdn.shopify.com/s/files/1/0436/4215/9257/files/doing_bayesian_data_analysis_2nd.pdf
    • https://cdn.shopify.com/s/files/1/0429/1310/4028/files/shaffer_blowout_preventer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/momogixejufibitax.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/ashrae_183.pdf
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/gogexovasijemenezar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1959/files/knee_conditioning_exercises_aaos.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/katasufebaxovupibipu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/wufuxozedizixijodokatijon.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/88194668376.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5099/files/wugolikivodawizanapetokif.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005317.bin
2852d6dd5d8333071d71718cad1dc9c1343aede7cb5ec7eca20200199112cb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5317 13908 bytes
font_01_sfnt_off0000801b.bin
0abe3ebdd1b9cc2b2b1abccfc1f393f55babf2fecb536bd21e4ffb364d2aa96a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801B 5108 bytes
font_02_sfnt_off00009177.bin
a9101ef8950baebfd61f30f2b48fb95e472ca516c500a45b800ed6150a319bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9177 14348 bytes
font_03_sfnt_off0000bdef.bin
b1b93bf558ee65cf174bdde98fc70b39c77ddcfeef9d3a00758a58eb2f24951c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEF 16260 bytes
font_04_sfnt_off0000d364.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD364 4324 bytes

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