Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e2c2b2a674f446…

MALICIOUS

PDF

45.4 KB Created: 2020-08-01 15:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14c1f79525fb6685346e73d0b5b87d5d SHA-1: 693587dc7a7ace24e85fda7d193e388b4b0b301c SHA-256: 53e2c2b2a674f44654b3dba6fb154dfcaebb6eca9f30527ca17ac1395ce13220
152 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains this URL and also references a large number of external PDF links hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The primary malicious IOC is the redirector URL, which is likely used to lead the user to a malicious site.

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.cc/pify?keyword=fonts+similar+to+impact
    • http://files.theschooloffinetuning.com/uploads/1/3/1/8/131871586/d34e8ce74.pdf
    • http://files.livingmagicentertainment.com/uploads/1/3/0/7/130739802/4082807.pdf
    • http://files.westseattlecoworking.com/uploads/1/3/1/3/131379049/tezazulixe.pdf
    • http://files.saratogamusicboosters.org/uploads/1/3/2/6/132695306/kosulab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/nutafanajaruvu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5295/5810/files/mikisarugilit.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/jipijerudovewamekuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/gosepebavexoxina.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/mufosufejelasudojop.pdf
    • https://cdn.shopify.com/s/files/1/0431/4093/9933/files/negipojetokikokigofoxuki.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/31765404448.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2480/files/pofexujegalojigavototata.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/tawopib.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/xuzujoluwebokakopiluwabi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/77108978054.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_off000066b6.bin
8599b18d5edb8807f5957a09ea54d69b0121393288696a81a1917ee216a8bef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B6 4704 bytes
font_01_sfnt_off00007681.bin
ed8436fc9da631a4dfd6809184669f019c825619d29867811b52481386af3432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7681 10552 bytes
font_02_sfnt_off00009a8e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8E 4324 bytes

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