Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ec61e551e3ab42…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 22:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c62c09999f99c7505176c02c0f7baa37 SHA-1: 94602dc79b7fbe7ed7e56cd2f260a958a776bd41 SHA-256: f7ec61e551e3ab42794b46d5e3f169e98000d6d3d00a08db6dfaf5e6381c6672
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a significant number of embedded links. One of these links, https://ttraff.ru/pify?keyword=seek+thermal+compact+pre+android, points to known malicious redirector infrastructure. The document body contains garbled text and what appears to be metadata, but the primary malicious activity is driven by the extensive link farm, which is a common technique for distributing malware or conducting phishing campaigns.

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.ru/pify?keyword=seek+thermal+compact+pre+android
    • http://files.mrinjectorparts.com/uploads/1/3/1/4/131454172/leverix.pdf
    • http://files.bolognareview.com/uploads/1/3/1/1/131164358/zomalopitebowoz-livenokaje.pdf
    • http://files.scenicchurch.com/uploads/1/3/0/8/130813755/xumuzuzi_nulevun.pdf
    • http://files.adamsromance.com/uploads/1/3/2/3/132302928/nilorogalisikig-wisaretuz-govika.pdf
    • http://fijived.chantelcherisselucier.com/uploads/1/3/1/1/131164312/62781dc46d7.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0807/files/music_notes_on_staff.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4160/files/pulokubefonokojagobi.pdf
    • https://cdn.shopify.com/s/files/1/0439/8029/2254/files/lionmakerstudios_hide_and_seek.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/what_can_you_do_with_webhooks_discord.pdf
    • https://cdn.shopify.com/s/files/1/0437/0310/7752/files/dokepovijola.pdf
    • https://cdn.shopify.com/s/files/1/0451/0292/3939/files/abnormal_gait.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1111/files/home_directory_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/95005011943.pdf
    • https://cdn.shopify.com/s/files/1/0446/7766/0825/files/convertir_de_a_word_ilove.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_off00006013.bin
bb9c6c5546a60df7e8935d38c05b73bac161a64e4d7357d36ab75253060f534d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6013 5300 bytes
font_01_sfnt_off000071e7.bin
4d4c4fee40b1d1c7cf6d002721e05093e29439c42ce7e1aeb3d1eb7f68a9fe8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E7 14696 bytes