Malicious PDF — malware analysis report

Static analysis result for SHA-256 28636b03dff2885f…

MALICIOUS

PDF

50.7 KB Created: 2020-08-13 21:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ac7c463eee4e99a0d2d36861e2ee318 SHA-1: 0eddfbdd0d780c6bdeae341a14d3536c25dd64ba SHA-256: 28636b03dff2885f910c672a2922d4b33c46ae759d629696b7a2df891afd9136
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=donation+receipt+template+canada'. This suggests a phishing or social engineering attack aiming to redirect the user to malicious content. The presence of numerous other links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination or to appear legitimate. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=donation+receipt+template+canada
    • http://files.tortugamobile.com/uploads/1/3/2/7/132710797/vomomuvam_rofovugeratu_delet.pdf
    • http://files.fbcpas.net/uploads/1/3/1/6/131606762/6f47e.pdf
    • http://files.connectingcoffee.com/uploads/1/3/0/8/130813095/wilokozamuletesi.pdf
    • http://files.threegracescoffee.com/uploads/1/3/1/1/131163658/metedexapusejudo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/34071287422.pdf
    • https://cdn.shopify.com/s/files/1/0430/2870/9539/files/69819014336.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/degore.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/tukinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/raspberry_pi_change_hostname.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/breviario_del_caos_albert_caraco.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/bufovugisejibezobuji.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/autonomy_in_nursing.pdf
    • https://cdn.shopify.com/s/files/1/0436/6080/4249/files/nikujudabogewazo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2046/files/caida_del_muro_de_berlin_causas_y_consecuencias.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakudegebemufajetexu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/jinajexowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/28585249624.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_off00008452.bin
d67aed6afe2835eb17b885d2437e2e477f3073a0fde7ebc580a851dd8bf4f97a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8452 5040 bytes
font_01_sfnt_off0000955a.bin
c673e73aef90df2d983360eab7ec7049936f2960aa20cacfbf3333353fa0a12a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x955A 11840 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.