Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb074a9dfc9bd7e…

MALICIOUS

PDF

47.7 KB Created: 2020-08-19 22:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3422cc022a7177c503aad0f00e26e920 SHA-1: 0ee9d2af52fe8d8e45b79f249a2b08f7b1d27ddf SHA-256: acb074a9dfc9bd7e056c7997298349d6ac3648850e47372ac23de59d77836d11
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a free project action plan template. The ML classifier strongly indicated maliciousness. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'free project action plan template word' and the malicious URL, reinforcing the lure.

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=free+project+action+plan+template+word
    • http://pukifovas.kienmassage.com/uploads/1/3/1/4/131437987/8366375.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1879/files/recette_de_cuisine_algrienne_samira.pdf
    • https://cdn.shopify.com/s/files/1/0431/4592/0669/files/4911036581.pdf
    • https://cdn.shopify.com/s/files/1/0439/1164/3304/files/zusedinozupuxidig.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/usmc_6105.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8342/files/66960175864.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0428/0074/2567/files/95464394785.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/dunufifoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/26253141949.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/42167249990.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/14498701863.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007073.bin
f1056ffe883d1dedbaf5aed534b1f4cdee1e1502dc52e62c3141cc0432e156c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7073 4952 bytes
font_01_sfnt_off00008139.bin
d83129e580dc0bd290c2103e2353a0559c01d8f4f1dc6380312a9b71b844acb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8139 10152 bytes
font_02_sfnt_off0000a3fd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FD 4324 bytes