Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa7513a53a794a0e…

MALICIOUS

PDF

39.5 KB Created: 2020-08-25 04:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c8cad4ee635098f3c999dd69340bfb2 SHA-1: e1eff7805b8461695422d6a56741de8e12a80f57 SHA-256: aa7513a53a794a0e00bc888d39e6ef1057aea19e6fe253d900942a5eaa10fc5e
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.com/pify?keyword=amman+songs+tamil+ringtone'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of the malicious redirector URL suggests the document's primary purpose is to redirect the user to a potentially harmful site.

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=amman+songs+tamil+ringtone
    • http://files.hiseyeshonduras.com/uploads/1/3/0/7/130740517/2061687.pdf
    • http://pezim.fexasas.com/uploads/1/3/0/8/130873851/votubisefopizoxorak.pdf
    • http://files.wildwellnessguide.com/uploads/1/3/1/6/131607565/6339750.pdf
    • https://cdn.shopify.com/s/files/1/0462/6762/9730/files/79506876766.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7843/files/45362017532.pdf
    • https://cdn.shopify.com/s/files/1/0431/9284/4448/files/71871931421.pdf
    • https://cdn.shopify.com/s/files/1/0429/2696/4903/files/homestead_exemption_fulton_county.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/dirafelotabutojonudowomej.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/derilezexidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/28581190517.pdf
    • https://cdn.shopify.com/s/files/1/0428/9822/7353/files/11225555570.pdf
    • https://cdn.shopify.com/s/files/1/0450/3538/9086/files/xadegukaxifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7505/files/body_language_joe_navarro.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_off00004778.bin
899202e27270852e14da5e7b3d88afa2d8a30a176cf5a18287f00cd389107b9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4778 4996 bytes
font_01_sfnt_off0000584d.bin
45703deaa79192b3ab9bd121eef9562ce49e65309d48bb2e73a8401e7025aca6
pdf-font-stream PDF embedded font (sfnt) at offset 0x584D 8692 bytes
font_02_sfnt_off00007128.bin
44af26c7a2d6a26d703aaad5719a5e7b7a0de4495594273a229b066caf638755
pdf-font-stream PDF embedded font (sfnt) at offset 0x7128 9384 bytes