Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae45111d45aa2e58…

MALICIOUS

PDF

40.7 KB Created: 2020-08-30 01:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 328c9e2c2b324bb6272647c0be6b0309 SHA-1: 13d08e35f5670b4e37ee9dc7fd394627612978c3 SHA-256: ae45111d45aa2e58cdc2ac9d970b21835027da1a2a2fb64861c6d0b4e6465770
152 Risk Score

Malware Insights

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

The PDF document contains a link disguised as a software keygen, which redirects to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the redirection to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, likely for SEO manipulation or to host further malicious content. No scripts were extracted, but the presence of a malicious redirector URL is sufficient to classify the attack pattern.

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/wix?keyword=finale+2014+keygen+windows
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/momasegij.pdf
    • https://cdn.shopify.com/s/files/1/0429/6713/8470/files/organic_chemistry_bsc_1st_year_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/kesesuwamet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaduvezumutup.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/majin.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3850/files/xezuxadotelabufajeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/bronkopneumonia_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vevisip.pdf
    • https://cdn.shopify.com/s/files/1/0429/8830/6586/files/anti_corruption_law_in_myanmar.pdf
    • https://static.usrfiles.com/ugd/b8c837_0480742dd71943639538b7cb4bedafa8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3118e2f9e9b4b358d7ff7f947133adf.pdf
    • https://static.usrfiles.com/ugd/585b1d_061ac7f200ca4da79ffe9594807e4199.pdf
    • https://static.usrfiles.com/ugd/b8c837_f68ba551c4664203a2ecacec1817c8da.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/2527259869.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/20649092358.pdf
    • https://cdn.shopify.com/s/files/1/0440/6149/1365/files/android_whatsapp_notification_sound_not_working.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_off00005f06.bin
0535e367ef1774f25006457493b86bf3abf16193f483c530d57cd70251ea71a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F06 5524 bytes
font_01_sfnt_off0000720e.bin
d5113244095d6bacb7b10538d56ed41ed634f58099cc90271d62bb166d28f625
pdf-font-stream PDF embedded font (sfnt) at offset 0x720E 11128 bytes