Malicious PDF — malware analysis report

Static analysis result for SHA-256 823344c515659eb3…

MALICIOUS

PDF

43.9 KB Created: 2020-08-11 21:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21f667df1783bc9e85e050fff0098749 SHA-1: e00a0ff58397836ac2099a16aea4381ad5ca27eb SHA-256: 823344c515659eb33c97a97f0a3a909635f1a2b651d79ad61cef232408037495
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.com/wb?keyword=fisher's%20quantity%20theory%20of%20money%20pdf'. This suggests a phishing or SEO poisoning attack, aiming to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=fisher
    • http://files.urbanmilan.com/uploads/1/3/1/0/131070520/4210231.pdf
    • http://files.woodcreekhighschoolband.com/uploads/1/3/1/4/131453847/livunifovupopodoxe.pdf
    • http://files.christianphoto.biz/uploads/1/3/0/9/130969435/wetexebapeko.pdf
    • http://files.updatescentral.com/uploads/1/3/1/3/131384018/fotimiva_nidanu_gibuvidedavade.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/tofoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/edema_pulmonar_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/28151231604.pdf
    • https://cdn.shopify.com/s/files/1/0438/8379/0491/files/davagitusukumuxedila.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3381/files/causes_of_copd.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/sigonit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/pivinopazolamut.pdf
    • https://cdn.shopify.com/s/files/1/0429/9610/5375/files/19752855003.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/vdara_spa_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/4755/8037/files/jivapibunure.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/fulugafefotejovolavivi.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/bullying_essay.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/33879130073.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c92.bin
a975f2860e317266b64a6ff284f5191aa2900eb1a7ddc4bbb83fbe9f82046105
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C92 5464 bytes
font_01_sfnt_off00007f09.bin
dafa4c10117725f995d5b5d3f616c00af435efe72ea0c9648b4059ba906aa833
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F09 10408 bytes