Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa0ec14ba42d380…

MALICIOUS

PDF

41.1 KB Created: 2020-08-01 03:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04882bd7781046309b2142bebc0afaa6 SHA-1: 83d32b32af5fc516dba1637bde291900796c9f6f SHA-256: 4fa0ec14ba42d380d20cf15706e5afec07e677eb1649d79749f3099e354e9bbb
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with many pointing to the ttraff.ru redirector service. This suggests a phishing or malware distribution attempt where the redirector is used to obscure the ultimate malicious destination. The presence of a large link farm within a small PDF further supports this, indicating an attempt to generate traffic or distribute malicious content through numerous links. No scripts were extracted, and the document body was largely unreadable, but the heuristic firings strongly indicate a malicious redirector pattern.

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=espier+launcher+ios+7
    • http://files.radmtfitness.com/uploads/1/3/1/1/131164479/lajixexofutat-pinudefosis.pdf
    • http://files.derekleif.org/uploads/1/3/1/3/131381850/d1b0b98872af6.pdf
    • http://files.mishapink.com/uploads/1/3/1/3/131397946/jakigekofijurarudoga.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/tunonawajenibo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/89078223166.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/51760209903.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/96326003896.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3893/files/23422432846.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/87777392792.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/74218550824.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/bunabuxik.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/balojewibukotitefa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/pazasenutox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4746/files/40985702136.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_off00006424.bin
c314fab3682f8c39f4135c3fab93c70c6b7f6772bf906f4cc5c4529d0dfcdb3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 5060 bytes
font_01_sfnt_off0000755b.bin
ca2ee6ebd49cbc38ace65f5b82dc22486ec03922d1b1f80280b56d196d5a6822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755B 10088 bytes

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