Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91df0a42221177c…

MALICIOUS

PDF

52.1 KB Created: 2020-08-09 00:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae940fe2398c845816013b8dbdc81c8b SHA-1: 2b404446417313b72d9a046d2f288f3cdafa9571 SHA-256: a91df0a42221177caa698d646677a20c479b32b5a962a5b40d95cacb20dc6e32
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF was flagged by a critical heuristic for containing a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=ipa+chart+english+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to benign Shopify domains but also include several unknown domains. The ML classifier also strongly indicated maliciousness. The presence of a malicious redirector suggests an attempt to lead users to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=ipa+chart+english+pdf
    • http://files.drydenmontgomerypark.org/uploads/1/3/0/8/130814466/xuzivapekewigir-vemebafesoxizeb-dazoredosubebit-mipebawiwunilef.pdf
    • http://kenozim.kbshoppingcenter.com/uploads/1/3/0/7/130775085/3673829.pdf
    • http://xebaluwa.riccio-builders.com/uploads/1/3/1/6/131637814/121282c.pdf
    • http://files.joel-nichols.com/uploads/1/3/2/7/132712120/1372492.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/vafusenuzejoxuxojipono.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/57630919309.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/92211881830.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8244/files/14026602174.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/33239865103.pdf
    • https://cdn.shopify.com/s/files/1/0437/8581/4177/files/waguwuvogufujewizagetaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0008/6175/files/8023611289.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/8885619696.pdf
    • https://cdn.shopify.com/s/files/1/0433/7818/0257/files/mexaletubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/nudulijekojare.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9728/files/vevarabigotolezula.pdf
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/91244642254.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/accounting_theory_belkaoui.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/widiwowinasotimiso.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_off00007aa1.bin
d1f71a93f089738629a31dcb4d257aff6e595f521e888c62816cb37fb144a71c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA1 5356 bytes
font_01_sfnt_off00008cd0.bin
0da2b8324c333007e060737ac35400ac2f54f75006ffcd2ef73baab50e2e65aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD0 17680 bytes