Malicious PDF — malware analysis report

Static analysis result for SHA-256 d264ce08e5d89c40…

MALICIOUS

PDF

42.6 KB Created: 2020-08-20 07:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2954426d32f2ea354803dd4977785d3 SHA-1: 4837eaa871382d9703e774f26004a0fb217e5563 SHA-256: d264ce08e5d89c40e6a23d3e3c61eeec754f274e29a09e052fc1b3051fc51398
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=osrs+spicy+stew+boost+guide'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on potentially compromised or disposable domains. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the malicious URL and appears to be a lure disguised as a guide.

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.cc/pify?keyword=osrs+spicy+stew+boost+guide
    • http://virogifas.applyready.com/uploads/1/3/1/3/131379685/220f3f.pdf
    • http://files.nataliezervou.com/uploads/1/3/0/9/130969438/vemid_kapejirude_zixisira_xojetusodidekum.pdf
    • http://files.concertedchaos.com/uploads/1/3/0/8/130813888/kosulilomuloz_wizezirunegego_lixiludakaviro.pdf
    • http://files.outdooradventurer.org/uploads/1/3/0/8/130873869/d0ab10cacf0ca6.pdf
    • http://files.bandstofans.com/uploads/1/3/1/8/131871642/43ee9e17c066a17.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/lidananubonasujobesalefuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/9795/5229/files/83774664045.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/fomoligarelukukuzowubonix.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/machine_learning_stock_market.pdf
    • https://cdn.shopify.com/s/files/1/0437/4410/0506/files/zoziku.pdf
    • https://cdn.shopify.com/s/files/1/0438/0239/4786/files/85299680130.pdf
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/eight_brocade_qigong.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/34464044062.pdf
    • https://cdn.shopify.com/s/files/1/0431/8078/5821/files/22850996064.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/wirelamixeb.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_off0000679a.bin
52d8818f37d1bffcb68a4c9734f3e64273735d51755127e5df81ff562d7699f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x679A 5360 bytes
font_01_sfnt_off000079f3.bin
36c57b27c2fe47ea99a84ab96dbb973079350a7406afbc4cbd555af5896ab6b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x79F3 10456 bytes