Malicious PDF — malware analysis report

Static analysis result for SHA-256 44921ac1174065de…

MALICIOUS

PDF

47.2 KB Created: 2020-08-04 14:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab2b5f89a6feca3e2b0d6198cf4e903c SHA-1: 7045577f52d8dbf2e15fa042918be787c0ee0b44 SHA-256: 44921ac1174065de383c7d00cf7813a0e2c99e9729b7495c346f3c33444aec98
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=abnormal+psychology+ann+m+kring+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning attempt. No scripts were extracted, and the document body is heavily obfuscated, but the malicious redirector is a strong indicator of malicious intent.

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.cc/pify?keyword=abnormal+psychology+ann+m+kring+pdf
    • http://files.danishclubnanaimo.com/uploads/1/3/1/4/131438313/zonujubiko.pdf
    • http://files.shopkashkoutureko.com/uploads/1/3/1/8/131871817/4992051.pdf
    • http://files.halrucker.com/uploads/1/3/0/7/130740429/3872811.pdf
    • http://files.sozoeyboutique.net/uploads/1/3/2/7/132740545/7676579.pdf
    • http://files.shopkashkoutureko.com/uploads/1/3/1/8/
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/18734190679.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/rulozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/65387722009.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/341799992.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/7932923948.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/xavolikifijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/minion_song_banana.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/wuvuxane.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/70519521728.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/45923797701.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/dodaxik.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006de5.bin
8061dfe71fcf825aac30d2570f44dc89a20ee336ff135e875d1a030bb68efc98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE5 5864 bytes
font_01_sfnt_off000081b0.bin
344bd3a4d88db83b3927605e19f0ee2e538e871806fc92f96eacf658060d2a43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B0 15132 bytes

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