Malicious PDF — malware analysis report

Static analysis result for SHA-256 990da7e6275251a3…

MALICIOUS

PDF

56.8 KB Created: 2020-07-30 22:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26ad303ede081bf951a613e128a90577 SHA-1: 58565a7b8bcfe7d31f296bd682d86e2f0912d41d SHA-256: 990da7e6275251a32f8a2706c0c28eb064112f304c70d5a2154ba9388f70e765
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a large number of external links suggests a link farm or SEO manipulation tactic, potentially to drive traffic to malicious content or to obscure the true destination of the links. No scripts were extracted, limiting the analysis of direct payload delivery.

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=angulos+en+fotografia+pdf
    • http://files.bampilates.com/uploads/1/3/1/4/131438741/1940dcd9a51.pdf
    • http://files.nerdnightphnompenh.com/uploads/1/3/0/9/130969182/9998602.pdf
    • http://files.whatnowlifecoaching.com/uploads/1/3/0/8/130814432/3612858.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/lavozukijadosogelipup.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/63490689074.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/56510865883.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/40223489445.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/93977846051.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdf
    • https://cdn.shopify.com/s/files/1/0430/4188/2265/files/58557234942.pdf
    • https://cdn.shopify.com/s/files/1/0432/9753/8203/files/3266108338.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/63381931883.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/79829988506.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/nenen.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/fabaja.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/22098130154.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/kapumot.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/57833791138.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/
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/93977846051

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ee7.bin
9ae93f501a20f8788fba231bef4d90f6d148b36ef03c00824daa0c313a2f9f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE7 5080 bytes
font_01_sfnt_off0000902d.bin
485009fb0e4c150c802b671b947a513222c886a7f82e193a6812ec08475bbe00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x902D 1804 bytes
font_02_sfnt_off0000990e.bin
37d5096fa9c94acd0f45114592f5be70e76a17cdd4b9d48dd5b689ed54caa5bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x990E 11384 bytes
font_03_sfnt_off0000be44.bin
f8e326b96df6c0457890c6346fd7f60b91beb129051a642dbd03fdf119a21fd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE44 16116 bytes

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