Malicious PDF — malware analysis report

Static analysis result for SHA-256 b440d336520c1ce4…

MALICIOUS

PDF

73.5 KB Created: 2020-08-22 19:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 457cb2f5f3ead5d0b82da0bd23711c35 SHA-1: 347a9debade864337fd8f397043421681a7699b7 SHA-256: b440d336520c1ce42a9459c1cff06633381fd606454c6b4d25f1681128e9e3f2
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=employees+provident+fund+board+annual+report'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify-hosted PDFs. The document body, though heavily corrupted, contains fragments suggesting it is an 'annual report' and includes the malicious URL, reinforcing the phishing or malware delivery pretext. No scripts were extracted, but the primary attack vector appears to be the malicious redirector.

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.com/pify?keyword=employees+provident+fund+board+annual+report
    • http://files.historyobscura.com/uploads/1/3/0/7/130776861/xupaxerapakoz.pdf
    • http://rurajitu.helenperezcpt.com/uploads/1/3/0/7/130775734/salavuwo_zimalukoru_posesarolokap.pdf
    • http://gokoxuxed.greencambridge.org/uploads/1/3/0/7/130776021/4671255.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/comportamiento_de_los_agentes_economicos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2117/9802/files/logical_connectors_list.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/97299201250.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/59792321554.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/49709182682.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/95790797331.pdf
    • https://cdn.shopify.com/s/files/1/0430/8061/4041/files/bible_timeline_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/astrophysics_for_the_person_in_a_hurry.pdf
    • https://cdn.shopify.com/s/files/1/0450/9663/2472/files/weniserizazawupifus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/smpte_color_bars.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/tewijuxavozogaxanub.pdf
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/25876091961.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_off0000d86b.bin
f47434b88fa2ee81c92c4c656a16889397631e57dab4c5d3f63ddf7a2c2babca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD86B 5444 bytes
font_01_sfnt_off0000eae3.bin
5be152ccc37f21e0587989cd5417383510ffaf26e5c815cf3322a41990330eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 14876 bytes

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